Merge branch 'no-var-rule' of https://github.com/graingert/CyberChef into graingert-no-var-rule

.eslintignore

@@ -0,0 +1 @@
+src/core/lib/**

src/.eslintrc.json → .eslintrc.json

@@ -84,7 +84,8 @@
         }],
         "no-whitespace-before-property": "error",
         "operator-linebreak": ["error", "after"],
-        "space-in-parens": "error"
+        "space-in-parens": "error",
+        "no-var": "error"
     },
     "globals": {
         "$": false,

Gruntfile.js

@@ -1,7 +1,7 @@
-var webpack = require("webpack"),
-    ExtractTextPlugin = require("extract-text-webpack-plugin"),
-    HtmlWebpackPlugin = require("html-webpack-plugin"),
-    Inliner = require("web-resource-inliner");
+const webpack = require("webpack");
+const ExtractTextPlugin = require("extract-text-webpack-plugin");
+const HtmlWebpackPlugin = require("html-webpack-plugin");
+const Inliner = require("web-resource-inliner");
 
 module.exports = function (grunt) {
     grunt.file.defaultEncoding = "utf8";
@@ -54,7 +54,7 @@ module.exports = function (grunt) {
 
 
     // Project configuration
-    var compileTime = grunt.template.today("dd/mm/yyyy HH:MM:ss") + " UTC",
+    const compileTime = grunt.template.today("dd/mm/yyyy HH:MM:ss") + " UTC",
         banner = "/**\n" +
             "* CyberChef - The Cyber Swiss Army Knife\n" +
             "*\n" +
@@ -80,7 +80,7 @@ module.exports = function (grunt) {
      * Compiles a production build of CyberChef into a single, portable web page.
      */
     function runInliner() {
-        var inlinerError = false;
+        const done = this.async();
         Inliner.html({
             relativeTo: "build/prod/",
             fileContent: grunt.file.read("build/prod/cyberchef.htm"),
@@ -91,14 +91,16 @@ module.exports = function (grunt) {
             strict: true
         }, function(error, result) {
             if (error) {
-                console.log(error);
-                inlinerError = true;
-                return false;
+                if (error instanceof Error) {
+                    done(error);
+                } else {
+                    done(new Error(error));
+                }
+            } else {
+                grunt.file.write("build/prod/cyberchef.htm", result);
+                done(true);
             }
-            grunt.file.write("build/prod/cyberchef.htm", result);
         });
-
-        return !inlinerError;
     }
 
     grunt.initConfig({
@@ -111,7 +113,7 @@ module.exports = function (grunt) {
         },
         eslint: {
             options: {
-                configFile: "src/.eslintrc.json"
+                configFile: "./.eslintrc.json"
             },
             configs: ["Gruntfile.js"],
             core: ["src/core/**/*.js", "!src/core/lib/**/*"],
@@ -301,7 +303,7 @@ module.exports = function (grunt) {
         copy: {
             ghPages: {
                 options: {
-                    process: function (content, srcpath) {
+                    process: function (content) {
                         // Add Google Analytics code to index.html
                         content = content.replace("</body></html>",
                             grunt.file.read("src/web/static/ga.html") + "</body></html>");
@@ -342,5 +344,4 @@ module.exports = function (grunt) {
             test: "build/test/index.js"
         },
     });
-
 };

src/core/Chef.js

@@ -11,7 +11,7 @@ import Recipe from "./Recipe.js";
  *
  * @class
  */
-var Chef = function() {
+const Chef = function() {
     this.dish = new Dish();
 };
 
@@ -35,7 +35,7 @@ var Chef = function() {
  * @returns {number} response.error - The error object thrown by a failed operation (false if no error)
 */
 Chef.prototype.bake = function(inputText, recipeConfig, options, progress, step) {
-    var startTime  = new Date().getTime(),
+    let startTime  = new Date().getTime(),
         recipe     = new Recipe(recipeConfig),
         containsFc = recipe.containsFlowControl(),
         error      = false;
@@ -111,7 +111,7 @@ Chef.prototype.bake = function(inputText, recipeConfig, options, progress, step)
  * @returns {number} The time it took to run the silent bake in milliseconds.
 */
 Chef.prototype.silentBake = function(recipeConfig) {
-    var startTime = new Date().getTime(),
+    let startTime = new Date().getTime(),
         recipe    = new Recipe(recipeConfig),
         dish      = new Dish("", Dish.STRING);
 

src/core/Dish.js

@@ -1,6 +1,5 @@
 import Utils from "./Utils.js";
 
-
 /**
  * The data being operated on by each operation.
  *
@@ -12,10 +11,10 @@ import Utils from "./Utils.js";
  * @param {byteArray|string|number} value - The value of the input data.
  * @param {number} type - The data type of value, see Dish enums.
  */
-var Dish = function(value, type) {
+function Dish(value, type) {
     this.value = value || typeof value == "string" ? value : null;
     this.type  = type || Dish.BYTE_ARRAY;
-};
+}
 
 
 /**
@@ -105,7 +104,7 @@ Dish.prototype.set = function(value, type) {
     this.type  = type;
 
     if (!this.valid()) {
-        var sample = Utils.truncate(JSON.stringify(this.value), 13);
+        const sample = Utils.truncate(JSON.stringify(this.value), 13);
         throw "Data is not a valid " + Dish.enumLookup(type) + ": " + sample;
     }
 };
@@ -180,7 +179,7 @@ Dish.prototype.valid = function() {
             }
 
             // Check that every value is a number between 0 - 255
-            for (var i = 0; i < this.value.length; i++) {
+            for (let i = 0; i < this.value.length; i++) {
                 if (typeof this.value[i] != "number" ||
                     this.value[i] < 0 ||
                     this.value[i] > 255) {

src/core/FlowControl.js

@@ -39,7 +39,7 @@ const FlowControl = {
      * @returns {Object} The updated state of the recipe.
      */
     runFork: function(state) {
-        var opList       = state.opList,
+        let opList       = state.opList,
             inputType    = opList[state.progress].inputType,
             outputType   = opList[state.progress].outputType,
             input        = state.dish.get(inputType),
@@ -48,14 +48,15 @@ const FlowControl = {
             mergeDelim   = ings[1],
             ignoreErrors = ings[2],
             subOpList    = [],
-            inputs       = [];
+            inputs       = [],
+            i;
 
         if (input)
             inputs = input.split(splitDelim);
 
         // Create subOpList for each tranche to operate on
         // (all remaining operations unless we encounter a Merge)
-        for (var i = state.progress + 1; i < opList.length; i++) {
+        for (i = state.progress + 1; i < opList.length; i++) {
             if (opList[i].name === "Merge" && !opList[i].isDisabled()) {
                 break;
             } else {
@@ -63,7 +64,7 @@ const FlowControl = {
             }
         }
 
-        var recipe = new Recipe(),
+        let recipe = new Recipe(),
             output = "",
             progress = 0;
 
@@ -71,7 +72,7 @@ const FlowControl = {
 
         // Run recipe over each tranche
         for (i = 0; i < inputs.length; i++) {
-            var dish = new Dish(inputs[i], inputType);
+            const dish = new Dish(inputs[i], inputType);
             try {
                 progress = recipe.execute(dish, 0);
             } catch (err) {
@@ -127,7 +128,7 @@ const FlowControl = {
      * @returns {Object} The updated state of the recipe.
      */
     runJump: function(state) {
-        var ings     = state.opList[state.progress].getIngValues(),
+        let ings     = state.opList[state.progress].getIngValues(),
             jumpNum  = ings[0],
             maxJumps = ings[1];
 
@@ -156,7 +157,7 @@ const FlowControl = {
      * @returns {Object} The updated state of the recipe.
      */
     runCondJump: function(state) {
-        var ings     = state.opList[state.progress].getIngValues(),
+        let ings     = state.opList[state.progress].getIngValues(),
             dish     = state.dish,
             regexStr = ings[0],
             jumpNum  = ings[1],

src/core/Ingredient.js

@@ -11,7 +11,7 @@ import Utils from "./Utils.js";
  * @class
  * @param {Object} ingredientConfig
  */
-var Ingredient = function(ingredientConfig) {
+const Ingredient = function(ingredientConfig) {
     this.name  = "";
     this.type  = "";
     this.value = null;
@@ -63,6 +63,7 @@ Ingredient.prototype.setValue = function(value) {
  * @param {string} type - The name of the data type.
 */
 Ingredient.prepare = function(data, type) {
+    let number;
     switch (type) {
         case "binaryString":
         case "binaryShortString":
@@ -76,9 +77,9 @@ Ingredient.prepare = function(data, type) {
                 return data;
             }
         case "number":
-            var number = parseFloat(data);
+            number = parseFloat(data);
             if (isNaN(number)) {
-                var sample = Utils.truncate(data.toString(), 10);
+                const sample = Utils.truncate(data.toString(), 10);
                 throw "Invalid ingredient value. Not a number: " + sample;
             }
             return number;

src/core/Operation.js

@@ -13,7 +13,7 @@ import Ingredient from "./Ingredient.js";
  * @param {string} operationName
  * @param {Object} operationConfig
  */
-var Operation = function(operationName, operationConfig) {
+const Operation = function(operationName, operationConfig) {
     this.name             = operationName;
     this.description      = "";
     this.inputType        = -1;
@@ -46,9 +46,9 @@ Operation.prototype._parseConfig = function(operationConfig) {
     this.highlightReverse = operationConfig.highlightReverse;
     this.flowControl      = operationConfig.flowControl;
 
-    for (var a = 0; a < operationConfig.args.length; a++) {
-        var ingredientConfig = operationConfig.args[a];
-        var ingredient = new Ingredient(ingredientConfig);
+    for (let a = 0; a < operationConfig.args.length; a++) {
+        const ingredientConfig = operationConfig.args[a];
+        const ingredient = new Ingredient(ingredientConfig);
         this.addIngredient(ingredient);
     }
 };
@@ -60,13 +60,13 @@ Operation.prototype._parseConfig = function(operationConfig) {
  * @returns {Object}
  */
 Operation.prototype.getConfig = function() {
-    var ingredientConfig = [];
+    const ingredientConfig = [];
 
-    for (var o = 0; o < this.ingList.length; o++) {
+    for (let o = 0; o < this.ingList.length; o++) {
         ingredientConfig.push(this.ingList[o].getConfig());
     }
 
-    var operationConfig = {
+    const operationConfig = {
         "op": this.name,
         "args": ingredientConfig
     };
@@ -91,7 +91,7 @@ Operation.prototype.addIngredient = function(ingredient) {
  * @param {Object[]} ingValues
  */
 Operation.prototype.setIngValues = function(ingValues) {
-    for (var i = 0; i < ingValues.length; i++) {
+    for (let i = 0; i < ingValues.length; i++) {
         this.ingList[i].setValue(ingValues[i]);
     }
 };
@@ -103,8 +103,8 @@ Operation.prototype.setIngValues = function(ingValues) {
  * @returns {Object[]}
  */
 Operation.prototype.getIngValues = function() {
-    var ingValues = [];
-    for (var i = 0; i < this.ingList.length; i++) {
+    const ingValues = [];
+    for (let i = 0; i < this.ingList.length; i++) {
         ingValues.push(this.ingList[i].value);
     }
     return ingValues;

src/core/Recipe.js

@@ -12,7 +12,7 @@ import OperationConfig from "./config/OperationConfig.js";
  * @class
  * @param {Object} recipeConfig
  */
-var Recipe = function(recipeConfig) {
+const Recipe = function(recipeConfig) {
     this.opList = [];
 
     if (recipeConfig) {
@@ -28,10 +28,10 @@ var Recipe = function(recipeConfig) {
  * @param {Object} recipeConfig
  */
 Recipe.prototype._parseConfig = function(recipeConfig) {
-    for (var c = 0; c < recipeConfig.length; c++) {
-        var operationName = recipeConfig[c].op;
-        var operationConfig = OperationConfig[operationName];
-        var operation = new Operation(operationName, operationConfig);
+    for (let c = 0; c < recipeConfig.length; c++) {
+        const operationName = recipeConfig[c].op;
+        const operationConfig = OperationConfig[operationName];
+        const operation = new Operation(operationName, operationConfig);
         operation.setIngValues(recipeConfig[c].args);
         operation.setBreakpoint(recipeConfig[c].breakpoint);
         operation.setDisabled(recipeConfig[c].disabled);
@@ -46,9 +46,9 @@ Recipe.prototype._parseConfig = function(recipeConfig) {
  * @returns {*}
  */
 Recipe.prototype.getConfig = function() {
-    var recipeConfig = [];
+    const recipeConfig = [];
 
-    for (var o = 0; o < this.opList.length; o++) {
+    for (let o = 0; o < this.opList.length; o++) {
         recipeConfig.push(this.opList[o].getConfig());
     }
 
@@ -98,7 +98,7 @@ Recipe.prototype.setBreakpoint = function(position, value) {
  * @param {number} pos
  */
 Recipe.prototype.removeBreaksUpTo = function(pos) {
-    for (var i = 0; i < pos; i++) {
+    for (let i = 0; i < pos; i++) {
         this.opList[i].setBreakpoint(false);
     }
 };
@@ -110,7 +110,7 @@ Recipe.prototype.removeBreaksUpTo = function(pos) {
  * @returns {boolean}
  */
 Recipe.prototype.containsFlowControl = function() {
-    for (var i = 0; i < this.opList.length; i++) {
+    for (let i = 0; i < this.opList.length; i++) {
         if (this.opList[i].isFlowControl()) return true;
     }
     return false;
@@ -125,7 +125,7 @@ Recipe.prototype.containsFlowControl = function() {
  * @returns (number}
  */
 Recipe.prototype.lastOpIndex = function(startIndex) {
-    var i = startIndex + 1 || 0,
+    let i = startIndex + 1 || 0,
         op;
 
     for (; i < this.opList.length; i++) {
@@ -147,9 +147,9 @@ Recipe.prototype.lastOpIndex = function(startIndex) {
  */
 Recipe.prototype.execute = function(dish, startFrom) {
     startFrom = startFrom || 0;
-    var op, input, output, numJumps = 0;
+    let op, input, output, numJumps = 0;
 
-    for (var i = startFrom; i < this.opList.length; i++) {
+    for (let i = startFrom; i < this.opList.length; i++) {
         op = this.opList[i];
         if (op.isDisabled()) {
             continue;
@@ -163,7 +163,7 @@ Recipe.prototype.execute = function(dish, startFrom) {
 
             if (op.isFlowControl()) {
                 // Package up the current state
-                var state = {
+                let state = {
                     "progress" : i,
                     "dish"     : dish,
                     "opList"  : this.opList,
@@ -178,7 +178,7 @@ Recipe.prototype.execute = function(dish, startFrom) {
                 dish.set(output, op.outputType);
             }
         } catch (err) {
-            var e = typeof err == "string" ? { message: err } : err;
+            const e = typeof err == "string" ? { message: err } : err;
 
             e.progress = i;
             if (e.fileName) {
@@ -213,7 +213,7 @@ Recipe.prototype.toString = function() {
  * @param {string} recipeStr
  */
 Recipe.prototype.fromString = function(recipeStr) {
-    var recipeConfig = JSON.parse(recipeStr);
+    const recipeConfig = JSON.parse(recipeStr);
     this._parseConfig(recipeConfig);
 };
 

src/core/operations/Base.js

@@ -26,7 +26,7 @@ const Base = {
         if (!input) {
             throw ("Error: Input must be a number");
         }
-        var radix = args[0] || Base.DEFAULT_RADIX;
+        const radix = args[0] || Base.DEFAULT_RADIX;
         if (radix < 2 || radix > 36) {
             throw "Error: Radix argument must be between 2 and 36";
         }
@@ -42,19 +42,19 @@ const Base = {
      * @returns {number}
      */
     runFrom: function(input, args) {
-        var radix = args[0] || Base.DEFAULT_RADIX;
+        const radix = args[0] || Base.DEFAULT_RADIX;
         if (radix < 2 || radix > 36) {
             throw "Error: Radix argument must be between 2 and 36";
         }
 
-        var number = input.replace(/\s/g, "").split("."),
+        let number = input.replace(/\s/g, "").split("."),
             result = parseInt(number[0], radix) || 0;
 
         if (number.length === 1) return result;
 
         // Fractional part
-        for (var i = 0; i < number[1].length; i++) {
-            var digit = parseInt(number[1][i], radix);
+        for (let i = 0; i < number[1].length; i++) {
+            const digit = parseInt(number[1][i], radix);
             result += digit / Math.pow(radix, i+1);
         }
 

src/core/operations/Base58.js

@@ -40,7 +40,7 @@ const Base58 = {
      * @returns {string}
      */
     runTo: function(input, args) {
-        var alphabet = args[0] || Base58.ALPHABET_OPTIONS[0].value,
+        let alphabet = args[0] || Base58.ALPHABET_OPTIONS[0].value,
             result = [0];
 
         alphabet = Utils.expandAlphRange(alphabet).join("");
@@ -53,11 +53,11 @@ const Base58 = {
         if (input.length === 0) return "";
 
         input.forEach(function(b) {
-            var carry = (result[0] << 8) + b;
+            let carry = (result[0] << 8) + b;
             result[0] = carry % 58;
             carry = (carry / 58) | 0;
 
-            for (var i = 1; i < result.length; i++) {
+            for (let i = 1; i < result.length; i++) {
                 carry += result[i] << 8;
                 result[i] = carry % 58;
                 carry = (carry / 58) | 0;
@@ -89,7 +89,7 @@ const Base58 = {
      * @returns {byteArray}
      */
     runFrom: function(input, args) {
-        var alphabet = args[0] || Base58.ALPHABET_OPTIONS[0].value,
+        let alphabet = args[0] || Base58.ALPHABET_OPTIONS[0].value,
             removeNonAlphaChars = args[1] === undefined ? true : args[1],
             result = [0];
 
@@ -103,7 +103,7 @@ const Base58 = {
         if (input.length === 0) return [];
 
         [].forEach.call(input, function(c, charIndex) {
-            var index = alphabet.indexOf(c);
+            const index = alphabet.indexOf(c);
 
             if (index === -1) {
                 if (removeNonAlphaChars) {
@@ -113,11 +113,11 @@ const Base58 = {
                 }
             }
 
-            var carry = result[0] * 58 + index;
+            let carry = result[0] * 58 + index;
             result[0] = carry & 0xFF;
             carry = carry >> 8;
 
-            for (var i = 1; i < result.length; i++) {
+            for (let i = 1; i < result.length; i++) {
                 carry += result[i] * 58;
                 result[i] = carry & 0xFF;
                 carry = carry >> 8;

src/core/operations/Base64.js

@@ -45,7 +45,7 @@ const Base64 = {
      * @returns {string}
      */
     runTo: function(input, args) {
-        var alphabet = args[0] || Base64.ALPHABET;
+        const alphabet = args[0] || Base64.ALPHABET;
         return Utils.toBase64(input, alphabet);
     },
 
@@ -64,7 +64,7 @@ const Base64 = {
      * @returns {byteArray}
      */
     runFrom: function(input, args) {
-        var alphabet = args[0] || Base64.ALPHABET,
+        let alphabet = args[0] || Base64.ALPHABET,
             removeNonAlphChars = args[1];
 
         return Utils.fromBase64(input, alphabet, "byteArray", removeNonAlphChars);
@@ -87,7 +87,7 @@ const Base64 = {
     runTo32: function(input, args) {
         if (!input) return "";
 
-        var alphabet = args[0] ?
+        let alphabet = args[0] ?
                 Utils.expandAlphRange(args[0]).join("") : "ABCDEFGHIJKLMNOPQRSTUVWXYZ234567=",
             output = "",
             chr1, chr2, chr3, chr4, chr5,
@@ -139,17 +139,17 @@ const Base64 = {
     runFrom32: function(input, args) {
         if (!input) return [];
 
-        var alphabet = args[0] ?
+        let alphabet = args[0] ?
                 Utils.expandAlphRange(args[0]).join("") : "ABCDEFGHIJKLMNOPQRSTUVWXYZ234567=",
             removeNonAlphChars = args[0];
 
-        var output = [],
+        let output = [],
             chr1, chr2, chr3, chr4, chr5,
             enc1, enc2, enc3, enc4, enc5, enc6, enc7, enc8,
             i = 0;
 
         if (removeNonAlphChars) {
-            var re = new RegExp("[^" + alphabet.replace(/[\]\\\-^]/g, "\\$&") + "]", "g");
+            const re = new RegExp("[^" + alphabet.replace(/[\]\\\-^]/g, "\\$&") + "]", "g");
             input = input.replace(re, "");
         }
 
@@ -199,7 +199,7 @@ const Base64 = {
      * @returns {html}
      */
     runOffsets: function(input, args) {
-        var alphabet = args[0] || Base64.ALPHABET,
+        let alphabet = args[0] || Base64.ALPHABET,
             showVariable = args[1],
             offset0 = Utils.toBase64(input, alphabet),
             offset1 = Utils.toBase64([0].concat(input), alphabet),

src/core/operations/BitwiseOp.js

@@ -26,12 +26,12 @@ const BitwiseOp = {
      */
     _bitOp: function (input, key, func, nullPreserving, scheme) {
         if (!key || !key.length) key = [0];
-        var result = [],
+        let result = [],
             x = null,
             k = null,
             o = null;
 
-        for (var i = 0; i < input.length; i++) {
+        for (let i = 0; i < input.length; i++) {
             k = key[i % key.length];
             o = input[i];
             x = nullPreserving && (o === 0 || o === k) ? o : func(o, k);
@@ -76,7 +76,7 @@ const BitwiseOp = {
      * @returns {byteArray}
      */
     runXor: function (input, args) {
-        var key = Utils.format[args[0].option].parse(args[0].string || ""),
+        let key = Utils.format[args[0].option].parse(args[0].string || ""),
             scheme = args[1],
             nullPreserving = args[2];
 
@@ -120,7 +120,7 @@ const BitwiseOp = {
      * @returns {string}
      */
     runXorBrute: function (input, args) {
-        var keyLength = parseInt(args[0], 10),
+        let keyLength = parseInt(args[0], 10),
             sampleLength = args[1],
             sampleOffset = args[2],
             nullPreserving = args[3],
@@ -130,7 +130,7 @@ const BitwiseOp = {
             outputHex = args[7],
             regex;
 
-        var output = "",
+        let output = "",
             result,
             resultUtf8;
 
@@ -141,7 +141,7 @@ const BitwiseOp = {
         }
 
 
-        for (var key = 1, l = Math.pow(256, keyLength); key < l; key++) {
+        for (let key = 1, l = Math.pow(256, keyLength); key < l; key++) {
             result = BitwiseOp._bitOp(input, Utils.hexToByteArray(key.toString(16)), BitwiseOp._xor, nullPreserving, differential);
             resultUtf8 = Utils.byteArrayToUtf8(result);
             if (crib !== "" && resultUtf8.search(regex) === -1) continue;
@@ -176,7 +176,7 @@ const BitwiseOp = {
      * @returns {byteArray}
      */
     runAnd: function (input, args) {
-        var key = Utils.format[args[0].option].parse(args[0].string || "");
+        let key = Utils.format[args[0].option].parse(args[0].string || "");
         key = Utils.wordArrayToByteArray(key);
 
         return BitwiseOp._bitOp(input, key, BitwiseOp._and);
@@ -191,7 +191,7 @@ const BitwiseOp = {
      * @returns {byteArray}
      */
     runOr: function (input, args) {
-        var key = Utils.format[args[0].option].parse(args[0].string || "");
+        let key = Utils.format[args[0].option].parse(args[0].string || "");
         key = Utils.wordArrayToByteArray(key);
 
         return BitwiseOp._bitOp(input, key, BitwiseOp._or);
@@ -206,7 +206,7 @@ const BitwiseOp = {
      * @returns {byteArray}
      */
     runAdd: function (input, args) {
-        var key = Utils.format[args[0].option].parse(args[0].string || "");
+        let key = Utils.format[args[0].option].parse(args[0].string || "");
         key = Utils.wordArrayToByteArray(key);
 
         return BitwiseOp._bitOp(input, key, BitwiseOp._add);
@@ -221,7 +221,7 @@ const BitwiseOp = {
      * @returns {byteArray}
      */
     runSub: function (input, args) {
-        var key = Utils.format[args[0].option].parse(args[0].string || "");
+        let key = Utils.format[args[0].option].parse(args[0].string || "");
         key = Utils.wordArrayToByteArray(key);
 
         return BitwiseOp._bitOp(input, key, BitwiseOp._sub);
@@ -301,7 +301,7 @@ const BitwiseOp = {
      * @returns {number}
      */
     _sub: function (operand, key) {
-        var result = operand - key;
+        const result = operand - key;
         return (result < 0) ? 256 + result : result;
     },
 

src/core/operations/ByteRepr.js

@@ -37,7 +37,7 @@ const ByteRepr = {
      * @returns {string}
      */
     runToHex: function(input, args) {
-        var delim = Utils.charRep[args[0] || "Space"];
+        const delim = Utils.charRep[args[0] || "Space"];
         return Utils.toHex(input, delim, 2);
     },
 
@@ -50,7 +50,7 @@ const ByteRepr = {
      * @returns {byteArray}
      */
     runFromHex: function(input, args) {
-        var delim = args[0] || "Space";
+        const delim = args[0] || "Space";
         return Utils.fromHex(input, delim, 2);
     },
 
@@ -64,7 +64,7 @@ const ByteRepr = {
      * @returns {string}
      */
     runToOct: function(input, args) {
-        var delim = Utils.charRep[args[0] || "Space"];
+        const delim = Utils.charRep[args[0] || "Space"];
         return input.map(val => val.toString(8)).join(delim);
     },
 
@@ -78,7 +78,7 @@ const ByteRepr = {
      * @returns {byteArray}
      */
     runFromOct: function(input, args) {
-        var delim = Utils.charRep[args[0] || "Space"];
+        const delim = Utils.charRep[args[0] || "Space"];
         if (input.length === 0) return [];
         return input.split(delim).map(val => parseInt(val, 8));
     },
@@ -98,7 +98,7 @@ const ByteRepr = {
      * @returns {string}
      */
     runToCharcode: function(input, args) {
-        var delim = Utils.charRep[args[0] || "Space"],
+        let delim = Utils.charRep[args[0] || "Space"],
             base = args[1],
             output = "",
             padding = 2,
@@ -108,7 +108,7 @@ const ByteRepr = {
             throw "Error: Base argument must be between 2 and 36";
         }
 
-        for (var i = 0; i < input.length; i++) {
+        for (let i = 0; i < input.length; i++) {
             ordinal = Utils.ord(input[i]);
 
             if (base === 16) {
@@ -139,7 +139,7 @@ const ByteRepr = {
      * @returns {byteArray}
      */
     runFromCharcode: function(input, args) {
-        var delim = Utils.charRep[args[0] || "Space"],
+        let delim = Utils.charRep[args[0] || "Space"],
             base = args[1],
             bites = input.split(delim),
             i = 0;
@@ -161,7 +161,7 @@ const ByteRepr = {
             }
         }
 
-        var latin1 = "";
+        let latin1 = "";
         for (i = 0; i < bites.length; i++) {
             latin1 += Utils.chr(parseInt(bites[i], base));
         }
@@ -179,7 +179,7 @@ const ByteRepr = {
      * @returns {Object[]} pos
      */
     highlightTo: function(pos, args) {
-        var delim = Utils.charRep[args[0] || "Space"],
+        let delim = Utils.charRep[args[0] || "Space"],
             len = delim === "\r\n" ? 1 : delim.length;
 
         pos[0].start = pos[0].start * (2 + len);
@@ -204,7 +204,7 @@ const ByteRepr = {
      * @returns {Object[]} pos
      */
     highlightFrom: function(pos, args) {
-        var delim = Utils.charRep[args[0] || "Space"],
+        let delim = Utils.charRep[args[0] || "Space"],
             len = delim === "\r\n" ? 1 : delim.length,
             width = len + 2;
 
@@ -230,7 +230,7 @@ const ByteRepr = {
      * @returns {string}
      */
     runToDecimal: function(input, args) {
-        var delim = Utils.charRep[args[0]];
+        const delim = Utils.charRep[args[0]];
         return input.join(delim);
     },
 
@@ -243,12 +243,12 @@ const ByteRepr = {
      * @returns {byteArray}
      */
     runFromDecimal: function(input, args) {
-        var delim = Utils.charRep[args[0]];
-        var byteStr = input.split(delim), output = [];
+        const delim = Utils.charRep[args[0]];
+        let byteStr = input.split(delim), output = [];
         if (byteStr[byteStr.length-1] === "")
             byteStr = byteStr.slice(0, byteStr.length-1);
 
-        for (var i = 0; i < byteStr.length; i++) {
+        for (let i = 0; i < byteStr.length; i++) {
             output[i] = parseInt(byteStr[i], 10);
         }
         return output;
@@ -263,11 +263,11 @@ const ByteRepr = {
      * @returns {string}
      */
     runToBinary: function(input, args) {
-        var delim = Utils.charRep[args[0] || "Space"],
+        let delim = Utils.charRep[args[0] || "Space"],
             output = "",
             padding = 8;
 
-        for (var i = 0; i < input.length; i++) {
+        for (let i = 0; i < input.length; i++) {
             output += Utils.pad(input[i].toString(2), padding) + delim;
         }
 
@@ -288,13 +288,13 @@ const ByteRepr = {
      */
     runFromBinary: function(input, args) {
         if (args[0] !== "None") {
-            var delimRegex = Utils.regexRep[args[0] || "Space"];
+            const delimRegex = Utils.regexRep[args[0] || "Space"];
             input = input.replace(delimRegex, "");
         }
 
-        var output = [];
-        var byteLen = 8;
-        for (var i = 0; i < input.length; i += byteLen) {
+        const output = [];
+        const byteLen = 8;
+        for (let i = 0; i < input.length; i += byteLen) {
             output.push(parseInt(input.substr(i, byteLen), 2));
         }
         return output;
@@ -311,7 +311,7 @@ const ByteRepr = {
      * @returns {Object[]} pos
      */
     highlightToBinary: function(pos, args) {
-        var delim = Utils.charRep[args[0] || "Space"];
+        const delim = Utils.charRep[args[0] || "Space"];
         pos[0].start = pos[0].start * (8 + delim.length);
         pos[0].end = pos[0].end * (8 + delim.length) - delim.length;
         return pos;
@@ -328,7 +328,7 @@ const ByteRepr = {
      * @returns {Object[]} pos
      */
     highlightFromBinary: function(pos, args) {
-        var delim = Utils.charRep[args[0] || "Space"];
+        const delim = Utils.charRep[args[0] || "Space"];
         pos[0].start = pos[0].start === 0 ? 0 : Math.floor(pos[0].start / (8 + delim.length));
         pos[0].end = pos[0].end === 0 ? 0 : Math.ceil(pos[0].end / (8 + delim.length));
         return pos;
@@ -354,19 +354,19 @@ const ByteRepr = {
      * @returns {string}
      */
     runToHexContent: function(input, args) {
-        var convert = args[0];
-        var spaces = args[1];
+        const convert = args[0];
+        const spaces = args[1];
         if (convert === "All chars") {
-            var result = "|" + Utils.toHex(input) + "|";
+            let result = "|" + Utils.toHex(input) + "|";
             if (!spaces) result = result.replace(/ /g, "");
             return result;
         }
 
-        var output = "",
+        let output = "",
             inHex = false,
             convertSpaces = convert === "Only special chars including spaces",
             b;
-        for (var i = 0; i < input.length; i++) {
+        for (let i = 0; i < input.length; i++) {
             b = input[i];
             if ((b === 32 && convertSpaces) || (b < 48 && b !== 32) || (b > 57 && b < 65) || (b > 90 && b < 97) || b > 122) {
                 if (!inHex) {
@@ -395,17 +395,17 @@ const ByteRepr = {
      * @returns {byteArray}
      */
     runFromHexContent: function(input, args) {
-        var regex = /\|([a-f\d ]{2,})\|/gi;
-        var output = [], m, i = 0;
+        const regex = /\|([a-f\d ]{2,})\|/gi;
+        let output = [], m, i = 0;
         while ((m = regex.exec(input))) {
             // Add up to match
             for (; i < m.index;)
                 output.push(Utils.ord(input[i++]));
 
             // Add match
-            var bytes = Utils.fromHex(m[1]);
+            const bytes = Utils.fromHex(m[1]);
             if (bytes) {
-                for (var a = 0; a < bytes.length;)
+                for (let a = 0; a < bytes.length;)
                     output.push(bytes[a++]);
             } else {
                 // Not valid hex, print as normal

src/core/operations/CharEnc.js

@@ -27,7 +27,7 @@ const CharEnc = {
      * @returns {string}
      */
     run: function(input, args) {
-        var inputFormat = args[0],
+        let inputFormat = args[0],
             outputFormat = args[1];
 
         if (inputFormat === "Windows-1251") {

src/core/operations/Checksum.js

@@ -20,10 +20,10 @@ const Checksum = {
      * @returns {string}
      */
     runFletcher8: function(input, args) {
-        var a = 0,
+        let a = 0,
             b = 0;
 
-        for (var i = 0; i < input.length; i++) {
+        for (let i = 0; i < input.length; i++) {
             a = (a + input[i]) % 0xf;
             b = (b + a) % 0xf;
         }
@@ -40,10 +40,10 @@ const Checksum = {
      * @returns {string}
      */
     runFletcher16: function(input, args) {
-        var a = 0,
+        let a = 0,
             b = 0;
 
-        for (var i = 0; i < input.length; i++) {
+        for (let i = 0; i < input.length; i++) {
             a = (a + input[i]) % 0xff;
             b = (b + a) % 0xff;
         }
@@ -60,10 +60,10 @@ const Checksum = {
      * @returns {string}
      */
     runFletcher32: function(input, args) {
-        var a = 0,
+        let a = 0,
             b = 0;
 
-        for (var i = 0; i < input.length; i++) {
+        for (let i = 0; i < input.length; i++) {
             a = (a + input[i]) % 0xffff;
             b = (b + a) % 0xffff;
         }
@@ -80,10 +80,10 @@ const Checksum = {
      * @returns {string}
      */
     runFletcher64: function(input, args) {
-        var a = 0,
+        let a = 0,
             b = 0;
 
-        for (var i = 0; i < input.length; i++) {
+        for (let i = 0; i < input.length; i++) {
             a = (a + input[i]) % 0xffffffff;
             b = (b + a) % 0xffffffff;
         }
@@ -100,11 +100,11 @@ const Checksum = {
      * @returns {string}
      */
     runAdler32: function(input, args) {
-        var MOD_ADLER = 65521,
+        let MOD_ADLER = 65521,
             a = 1,
             b = 0;
 
-        for (var i = 0; i < input.length; i++) {
+        for (let i = 0; i < input.length; i++) {
             a += input[i];
             b += a;
         }
@@ -124,10 +124,10 @@ const Checksum = {
      * @returns {string}
      */
     runCRC32: function(input, args) {
-        var crcTable = global.crcTable || (global.crcTable = Checksum._genCRCTable()),
+        let crcTable = global.crcTable || (global.crcTable = Checksum._genCRCTable()),
             crc = 0 ^ (-1);
 
-        for (var i = 0; i < input.length; i++) {
+        for (let i = 0; i < input.length; i++) {
             crc = (crc >>> 8) ^ crcTable[(crc ^ input[i]) & 0xff];
         }
 
@@ -153,9 +153,9 @@ const Checksum = {
      *                      0x00,0x00,0xac,0x11,0x00,0x03,0xac,0x11,0x00,0x04])
      */
     runTCPIP: function(input, args) {
-        var csum = 0;
+        let csum = 0;
 
-        for (var i = 0; i < input.length; i++) {
+        for (let i = 0; i < input.length; i++) {
             if (i % 2 === 0) {
                 csum += (input[i] << 8);
             } else {
@@ -176,12 +176,12 @@ const Checksum = {
      * @returns {array}
      */
     _genCRCTable: function() {
-        var c,
+        let c,
             crcTable = [];
 
-        for (var n = 0; n < 256; n++) {
+        for (let n = 0; n < 256; n++) {
             c = n;
-            for (var k = 0; k < 8; k++) {
+            for (let k = 0; k < 8; k++) {
                 c = ((c & 1) ? (0xEDB88320 ^ (c >>> 1)) : (c >>> 1));
             }
             crcTable[n] = c;

src/core/operations/Cipher.js

@@ -61,7 +61,7 @@ const Cipher = {
      * @returns {string}
      */
     _enc: function (algo, input, args) {
-        var key = Utils.format[args[0].option].parse(args[0].string || ""),
+        let key = Utils.format[args[0].option].parse(args[0].string || ""),
             iv = Utils.format[args[1].option].parse(args[1].string || ""),
             salt = Utils.format[args[2].option].parse(args[2].string || ""),
             mode = CryptoJS.mode[args[3]],
@@ -74,14 +74,14 @@ const Cipher = {
             key = key.toString(CryptoJS.enc.Latin1);
         }
 
-        var encrypted = algo.encrypt(input, key, {
+        const encrypted = algo.encrypt(input, key, {
             salt: salt.sigBytes > 0 ? salt : false,
             iv: iv.sigBytes > 0 ? iv : null,
             mode: mode,
             padding: padding
         });
 
-        var result = "";
+        let result = "";
         if (resultOption === "show all") {
             result += "Key:  " + encrypted.key.toString(Utils.format[outputFormat]);
             result += "\nIV:   " + encrypted.iv.toString(Utils.format[outputFormat]);
@@ -105,7 +105,7 @@ const Cipher = {
      * @returns {string}
      */
     _dec: function (algo, input, args) {
-        var key = Utils.format[args[0].option].parse(args[0].string || ""),
+        let key = Utils.format[args[0].option].parse(args[0].string || ""),
             iv = Utils.format[args[1].option].parse(args[1].string || ""),
             salt = Utils.format[args[2].option].parse(args[2].string || ""),
             mode = CryptoJS.mode[args[3]],
@@ -118,14 +118,14 @@ const Cipher = {
             return "No input";
         }
 
-        var ciphertext = Utils.format[inputFormat].parse(input);
+        const ciphertext = Utils.format[inputFormat].parse(input);
 
         if (iv.sigBytes === 0) {
             // Use passphrase rather than key. Need to convert it to a string.
             key = key.toString(CryptoJS.enc.Latin1);
         }
 
-        var decrypted = algo.decrypt({
+        const decrypted = algo.decrypt({
             ciphertext: ciphertext,
             salt: salt.sigBytes > 0 ? salt : false
         }, key, {
@@ -134,7 +134,7 @@ const Cipher = {
             padding: padding
         });
 
-        var result;
+        let result;
         try {
             result = decrypted.toString(Utils.format[outputFormat]);
         } catch (err) {
@@ -260,13 +260,13 @@ const Cipher = {
      * @returns {string}
      */
     runBlowfishEnc: function (input, args) {
-        var key = Utils.format[args[0].option].parse(args[0].string).toString(Utils.format.Latin1),
+        let key = Utils.format[args[0].option].parse(args[0].string).toString(Utils.format.Latin1),
             mode = args[1],
             outputFormat = args[2];
 
         if (key.length === 0) return "Enter a key";
 
-        var encHex = Blowfish.encrypt(input, key, {
+        let encHex = Blowfish.encrypt(input, key, {
                 outputType: 1,
                 cipherMode: Cipher.BLOWFISH_MODES.indexOf(mode)
             }),
@@ -284,7 +284,7 @@ const Cipher = {
      * @returns {string}
      */
     runBlowfishDec: function (input, args) {
-        var key = Utils.format[args[0].option].parse(args[0].string).toString(Utils.format.Latin1),
+        let key = Utils.format[args[0].option].parse(args[0].string).toString(Utils.format.Latin1),
             mode = args[1],
             inputFormat = args[2];
 
@@ -318,7 +318,7 @@ const Cipher = {
      * @returns {string}
      */
     runPbkdf2: function (input, args) {
-        var keySize = args[0] / 32,
+        let keySize = args[0] / 32,
             iterations = args[1],
             salt = CryptoJS.enc.Hex.parse(args[2] || ""),
             inputFormat = args[3],
@@ -338,7 +338,7 @@ const Cipher = {
      * @returns {string}
      */
     runEvpkdf: function (input, args) {
-        var keySize = args[0] / 32,
+        let keySize = args[0] / 32,
             iterations = args[1],
             salt = CryptoJS.enc.Hex.parse(args[2] || ""),
             inputFormat = args[3],
@@ -358,7 +358,7 @@ const Cipher = {
      * @returns {string}
      */
     runRc4: function (input, args) {
-        var message = Utils.format[args[1]].parse(input),
+        let message = Utils.format[args[1]].parse(input),
             passphrase = Utils.format[args[0].option].parse(args[0].string),
             encrypted = CryptoJS.RC4.encrypt(message, passphrase);
 
@@ -380,7 +380,7 @@ const Cipher = {
      * @returns {string}
      */
     runRc4drop: function (input, args) {
-        var message = Utils.format[args[1]].parse(input),
+        let message = Utils.format[args[1]].parse(input),
             passphrase = Utils.format[args[0].option].parse(args[0].string),
             drop = args[3],
             encrypted = CryptoJS.RC4Drop.encrypt(message, passphrase, { drop: drop });
@@ -398,7 +398,7 @@ const Cipher = {
      * @returns {string}
      */
     runVigenereEnc: function (input, args) {
-        var alphabet = "abcdefghijklmnopqrstuvwxyz",
+        let alphabet = "abcdefghijklmnopqrstuvwxyz",
             key = args[0].toLowerCase(),
             output = "",
             fail = 0,
@@ -409,7 +409,7 @@ const Cipher = {
         if (!key) return "No key entered";
         if (!/^[a-zA-Z]+$/.test(key)) return "The key must consist only of letters";
 
-        for (var i = 0; i < input.length; i++) {
+        for (let i = 0; i < input.length; i++) {
             if (alphabet.indexOf(input[i]) >= 0) {
                 // Get the corresponding character of key for the current letter, accounting
                 // for chars not in alphabet
@@ -445,7 +445,7 @@ const Cipher = {
      * @returns {string}
      */
     runVigenereDec: function (input, args) {
-        var alphabet = "abcdefghijklmnopqrstuvwxyz",
+        let alphabet = "abcdefghijklmnopqrstuvwxyz",
             key = args[0].toLowerCase(),
             output = "",
             fail = 0,
@@ -456,7 +456,7 @@ const Cipher = {
         if (!key) return "No key entered";
         if (!/^[a-zA-Z]+$/.test(key)) return "The key must consist only of letters";
 
-        for (var i = 0; i < input.length; i++) {
+        for (let i = 0; i < input.length; i++) {
             if (alphabet.indexOf(input[i]) >= 0) {
                 chr = key[(i - fail) % key.length];
                 keyIndex = alphabet.indexOf(chr);
@@ -499,7 +499,7 @@ const Cipher = {
      * @returns {string}
      */
     runAffineEnc: function (input, args) {
-        var alphabet = "abcdefghijklmnopqrstuvwxyz",
+        let alphabet = "abcdefghijklmnopqrstuvwxyz",
             a = args[0],
             b = args[1],
             output = "";
@@ -508,7 +508,7 @@ const Cipher = {
             return "The values of a and b can only be integers.";
         }
 
-        for (var i = 0; i < input.length; i++) {
+        for (let i = 0; i < input.length; i++) {
             if (alphabet.indexOf(input[i]) >= 0) {
                 // Uses the affine function ax+b % m = y (where m is length of the alphabet)
                 output += alphabet[((a * alphabet.indexOf(input[i])) + b) % 26];
@@ -533,7 +533,7 @@ const Cipher = {
      * @returns {string}
      */
     runAffineDec: function (input, args) {
-        var alphabet = "abcdefghijklmnopqrstuvwxyz",
+        let alphabet = "abcdefghijklmnopqrstuvwxyz",
             a = args[0],
             b = args[1],
             output = "",
@@ -550,7 +550,7 @@ const Cipher = {
         // Calculates modular inverse of a
         aModInv = Utils.modInv(a, 26);
 
-        for (var i = 0; i < input.length; i++) {
+        for (let i = 0; i < input.length; i++) {
             if (alphabet.indexOf(input[i]) >= 0) {
                 // Uses the affine decode function (y-b * A') % m = x (where m is length of the alphabet and A' is modular inverse)
                 output += alphabet[Utils.mod((alphabet.indexOf(input[i]) - b) * aModInv, 26)];
@@ -598,7 +598,7 @@ const Cipher = {
      * @returns {byteArray}
      */
     runSubstitute: function (input, args) {
-        var plaintext = Utils.strToByteArray(Utils.expandAlphRange(args[0]).join()),
+        let plaintext = Utils.strToByteArray(Utils.expandAlphRange(args[0]).join()),
             ciphertext = Utils.strToByteArray(Utils.expandAlphRange(args[1]).join()),
             output = [],
             index = -1;
@@ -607,7 +607,7 @@ const Cipher = {
             output = Utils.strToByteArray("Warning: Plaintext and Ciphertext lengths differ\n\n");
         }
 
-        for (var i = 0; i < input.length; i++) {
+        for (let i = 0; i < input.length; i++) {
             index = plaintext.indexOf(input[i]);
             output.push(index > -1 && index < ciphertext.length ? ciphertext[index] : input[i]);
         }
@@ -650,10 +650,10 @@ CryptoJS.kdf.OpenSSL.execute = function (password, keySize, ivSize, salt) {
     }
 
     // Derive key and IV
-    var key = CryptoJS.algo.EvpKDF.create({ keySize: keySize + ivSize }).compute(password, salt);
+    const key = CryptoJS.algo.EvpKDF.create({ keySize: keySize + ivSize }).compute(password, salt);
 
     // Separate key and IV
-    var iv = CryptoJS.lib.WordArray.create(key.words.slice(keySize), ivSize * 4);
+    const iv = CryptoJS.lib.WordArray.create(key.words.slice(keySize), ivSize * 4);
     key.sigBytes = keySize * 4;
 
     // Return params

src/core/operations/Code.js

@@ -37,7 +37,7 @@ const Code = {
      * @returns {html}
      */
     runSyntaxHighlight: function(input, args) {
-        var language = args[0],
+        let language = args[0],
             lineNums = args[1];
         return "<code class='prettyprint'>" + prettyPrintOne(Utils.escapeHtml(input), language, lineNums) + "</code>";
     },
@@ -57,7 +57,7 @@ const Code = {
      * @returns {string}
      */
     runXmlBeautify: function(input, args) {
-        var indentStr = args[0];
+        const indentStr = args[0];
         return vkbeautify.xml(input, indentStr);
     },
 
@@ -70,7 +70,7 @@ const Code = {
      * @returns {string}
      */
     runJsonBeautify: function(input, args) {
-        var indentStr = args[0];
+        const indentStr = args[0];
         if (!input) return "";
         return vkbeautify.json(input, indentStr);
     },
@@ -84,7 +84,7 @@ const Code = {
      * @returns {string}
      */
     runCssBeautify: function(input, args) {
-        var indentStr = args[0];
+        const indentStr = args[0];
         return vkbeautify.css(input, indentStr);
     },
 
@@ -97,7 +97,7 @@ const Code = {
      * @returns {string}
      */
     runSqlBeautify: function(input, args) {
-        var indentStr = args[0];
+        const indentStr = args[0];
         return vkbeautify.sql(input, indentStr);
     },
 
@@ -116,7 +116,7 @@ const Code = {
      * @returns {string}
      */
     runXmlMinify: function(input, args) {
-        var preserveComments = args[0];
+        const preserveComments = args[0];
         return vkbeautify.xmlmin(input, preserveComments);
     },
 
@@ -142,7 +142,7 @@ const Code = {
      * @returns {string}
      */
     runCssMinify: function(input, args) {
-        var preserveComments = args[0];
+        const preserveComments = args[0];
         return vkbeautify.cssmin(input, preserveComments);
     },
 
@@ -183,45 +183,45 @@ const Code = {
      * @returns {string}
      */
     runGenericBeautify: function(input, args) {
-        var code = input,
+        let code = input,
             t = 0,
             preservedTokens = [],
             m;
 
         // Remove strings
-        var sstrings = /'([^'\\]|\\.)*'/g;
+        const sstrings = /'([^'\\]|\\.)*'/g;
         while ((m = sstrings.exec(code))) {
             code = preserveToken(code, m, t++);
             sstrings.lastIndex = m.index;
         }
 
-        var dstrings = /"([^"\\]|\\.)*"/g;
+        const dstrings = /"([^"\\]|\\.)*"/g;
         while ((m = dstrings.exec(code))) {
             code = preserveToken(code, m, t++);
             dstrings.lastIndex = m.index;
         }
 
         // Remove comments
-        var scomments = /\/\/[^\n\r]*/g;
+        const scomments = /\/\/[^\n\r]*/g;
         while ((m = scomments.exec(code))) {
             code = preserveToken(code, m, t++);
             scomments.lastIndex = m.index;
         }
 
-        var mcomments = /\/\*[\s\S]*?\*\//gm;
+        const mcomments = /\/\*[\s\S]*?\*\//gm;
         while ((m = mcomments.exec(code))) {
             code = preserveToken(code, m, t++);
             mcomments.lastIndex = m.index;
         }
 
-        var hcomments = /(^|\n)#[^\n\r#]+/g;
+        const hcomments = /(^|\n)#[^\n\r#]+/g;
         while ((m = hcomments.exec(code))) {
             code = preserveToken(code, m, t++);
             hcomments.lastIndex = m.index;
         }
 
         // Remove regexes
-        var regexes = /\/.*?[^\\]\/[gim]{0,3}/gi;
+        const regexes = /\/.*?[^\\]\/[gim]{0,3}/gi;
         while ((m = regexes.exec(code))) {
             code = preserveToken(code, m, t++);
             regexes.lastIndex = m.index;
@@ -243,8 +243,9 @@ const Code = {
                 .replace(/\n{/g, "{");
 
         // Indent
-        var i = 0,
-            level = 0;
+        let i = 0,
+            level = 0,
+            indent;
         while (i < code.length) {
             switch (code[i]) {
                 case "{":
@@ -254,7 +255,7 @@ const Code = {
                     if (i+1 >= code.length) break;
 
                     if (code[i+1] === "}") level--;
-                    var indent = (level >= 0) ? Array(level*4+1).join(" ") : "";
+                    indent = (level >= 0) ? Array(level*4+1).join(" ") : "";
 
                     code = code.substring(0, i+1) + indent + code.substring(i+1);
                     if (level > 0) i += level*4;
@@ -287,9 +288,9 @@ const Code = {
                 .replace(/}\s*(else|catch|except|finally|elif|elseif|else if)/gi, "} $1");
 
         // Replace preserved tokens
-        var ptokens = /###preservedToken(\d+)###/g;
+        const ptokens = /###preservedToken(\d+)###/g;
         while ((m = ptokens.exec(code))) {
-            var ti = parseInt(m[1], 10);
+            const ti = parseInt(m[1], 10);
             code = code.substring(0, m.index) + preservedTokens[ti] + code.substring(m.index + m[0].length);
             ptokens.lastIndex = m.index;
         }
@@ -329,24 +330,24 @@ const Code = {
      * @returns {string}
      */
     runXpath:function(input, args) {
-        var query = args[0],
+        let query = args[0],
             delimiter = args[1];
 
-        var doc;
+        let doc;
         try {
             doc = new dom().parseFromString(input);
         } catch (err) {
             return "Invalid input XML.";
         }
 
-        var nodes;
+        let nodes;
         try {
             nodes = xpath.select(query, doc);
         } catch (err) {
             return "Invalid XPath. Details:\n" + err.message;
         }
 
-        var nodeToString = function(node) {
+        const nodeToString = function(node) {
             return node.toString();
         };
 
@@ -376,7 +377,7 @@ const Code = {
      * @returns {string}
      */
     runCSSQuery: function(input, args) {
-        var query = args[0],
+        let query = args[0],
             delimiter = args[1],
             parser = new DOMParser(),
             html,
@@ -398,7 +399,7 @@ const Code = {
             return "Invalid CSS Selector. Details:\n" + err.message;
         }
 
-        var nodeToString = function(node) {
+        const nodeToString = function(node) {
             switch (node.nodeType) {
                 case Node.ELEMENT_NODE: return node.outerHTML;
                 case Node.ATTRIBUTE_NODE: return node.value;

src/core/operations/Compress.js

@@ -6,7 +6,7 @@ import zip from "zlibjs/bin/zip.min";
 import unzip from "zlibjs/bin/unzip.min";
 import bzip2 from "exports-loader?bzip2!../lib/bzip2.js";
 
-var Zlib = {
+const Zlib = {
     RawDeflate: rawdeflate.Zlib.RawDeflate,
     RawInflate: rawinflate.Zlib.RawInflate,
     Deflate: zlibAndGzip.Zlib.Deflate,
@@ -67,7 +67,7 @@ const Compress = {
      * @returns {byteArray}
      */
     runRawDeflate: function(input, args) {
-        var deflate = new Zlib.RawDeflate(input, {
+        const deflate = new Zlib.RawDeflate(input, {
             compressionType: Compress.RAW_COMPRESSION_TYPE_LOOKUP[args[0]]
         });
         return Array.prototype.slice.call(deflate.compress());
@@ -113,7 +113,7 @@ const Compress = {
     runRawInflate: function(input, args) {
         // Deal with character encoding issues
         input = Utils.strToByteArray(Utils.byteArrayToUtf8(input));
-        var inflate = new Zlib.RawInflate(input, {
+        let inflate = new Zlib.RawInflate(input, {
                 index: args[0],
                 bufferSize: args[1],
                 bufferType: Compress.RAW_BUFFER_TYPE_LOOKUP[args[2]],
@@ -129,8 +129,8 @@ const Compress = {
         if (result.length > 158 && result[0] === 93 && result[5] === 93) {
             // If the first two square brackets are there, check that the others
             // are also there. If they are, throw an error. If not, continue.
-            var valid = false;
-            for (var i = 0; i < 155; i += 5) {
+            let valid = false;
+            for (let i = 0; i < 155; i += 5) {
                 if (result[i] !== 93) {
                     valid = true;
                 }
@@ -163,7 +163,7 @@ const Compress = {
      * @returns {byteArray}
      */
     runZlibDeflate: function(input, args) {
-        var deflate = new Zlib.Deflate(input, {
+        const deflate = new Zlib.Deflate(input, {
             compressionType: Compress.ZLIB_COMPRESSION_TYPE_LOOKUP[args[0]]
         });
         return Array.prototype.slice.call(deflate.compress());
@@ -189,7 +189,7 @@ const Compress = {
     runZlibInflate: function(input, args) {
         // Deal with character encoding issues
         input = Utils.strToByteArray(Utils.byteArrayToUtf8(input));
-        var inflate = new Zlib.Inflate(input, {
+        const inflate = new Zlib.Inflate(input, {
             index: args[0],
             bufferSize: args[1],
             bufferType: Compress.ZLIB_BUFFER_TYPE_LOOKUP[args[2]],
@@ -214,7 +214,7 @@ const Compress = {
      * @returns {byteArray}
      */
     runGzip: function(input, args) {
-        var filename = args[1],
+        let filename = args[1],
             comment = args[2],
             options = {
                 deflateOptions: {
@@ -234,7 +234,7 @@ const Compress = {
             options.comment = comment;
         }
 
-        var gzip = new Zlib.Gzip(input, options);
+        const gzip = new Zlib.Gzip(input, options);
         return Array.prototype.slice.call(gzip.compress());
     },
 
@@ -249,7 +249,7 @@ const Compress = {
     runGunzip: function(input, args) {
         // Deal with character encoding issues
         input = Utils.strToByteArray(Utils.byteArrayToUtf8(input));
-        var gunzip = new Zlib.Gunzip(input);
+        const gunzip = new Zlib.Gunzip(input);
         return Array.prototype.slice.call(gunzip.decompress());
     },
 
@@ -285,7 +285,7 @@ const Compress = {
      * @returns {byteArray}
      */
     runPkzip: function(input, args) {
-        var password = Utils.strToByteArray(args[2]),
+        let password = Utils.strToByteArray(args[2]),
             options = {
                 filename: Utils.strToByteArray(args[0]),
                 comment: Utils.strToByteArray(args[1]),
@@ -318,7 +318,7 @@ const Compress = {
      * @returns {string}
      */
     runPkunzip: function(input, args) {
-        var options = {
+        let options = {
                 password: Utils.strToByteArray(args[0]),
                 verify: args[1]
             },
@@ -327,15 +327,15 @@ const Compress = {
             files = [];
 
         filenames.forEach(function(fileName) {
-            var bytes = unzip.decompress(fileName);
-            var contents = Utils.byteArrayToUtf8(bytes);
+            const bytes = unzip.decompress(fileName);
+            const contents = Utils.byteArrayToUtf8(bytes);
 
-            var file = {
+            const file = {
                 fileName: fileName,
                 size: contents.length,
             };
 
-            var isDir = contents.length === 0 && fileName.endsWith("/");
+            const isDir = contents.length === 0 && fileName.endsWith("/");
             if (!isDir) {
                 file.bytes = bytes;
                 file.contents = contents;
@@ -356,7 +356,7 @@ const Compress = {
      * @returns {string}
      */
     runBzip2Decompress: function(input, args) {
-        var compressed = new Uint8Array(input),
+        let compressed = new Uint8Array(input),
             bzip2Reader,
             plain = "";
 
@@ -383,19 +383,19 @@ const Compress = {
      * @returns {byteArray}
      */
     runTar: function(input, args) {
-        var Tarball = function() {
+        const Tarball = function() {
             this.bytes = new Array(512);
             this.position = 0;
         };
 
         Tarball.prototype.addEmptyBlock = function() {
-            var filler = new Array(512);
+            const filler = new Array(512);
             filler.fill(0);
             this.bytes = this.bytes.concat(filler);
         };
 
         Tarball.prototype.writeBytes = function(bytes) {
-            var self = this;
+            const self = this;
 
             if (this.position + bytes.length > this.bytes.length) {
                 this.addEmptyBlock();
@@ -412,17 +412,17 @@ const Compress = {
         };
 
         Tarball.prototype.writeEndBlocks = function() {
-            var numEmptyBlocks = 2;
-            for (var i = 0; i < numEmptyBlocks; i++) {
+            const numEmptyBlocks = 2;
+            for (let i = 0; i < numEmptyBlocks; i++) {
                 this.addEmptyBlock();
             }
         };
 
-        var fileSize = Utils.padLeft(input.length.toString(8), 11, "0");
-        var currentUnixTimestamp = Math.floor(Date.now() / 1000);
-        var lastModTime = Utils.padLeft(currentUnixTimestamp.toString(8), 11, "0");
+        const fileSize = Utils.padLeft(input.length.toString(8), 11, "0");
+        const currentUnixTimestamp = Math.floor(Date.now() / 1000);
+        const lastModTime = Utils.padLeft(currentUnixTimestamp.toString(8), 11, "0");
 
-        var file = {
+        const file = {
             fileName: Utils.padBytesRight(args[0], 100),
             fileMode: Utils.padBytesRight("0000664", 8),
             ownerUID: Utils.padBytesRight("0", 8),
@@ -441,9 +441,9 @@ const Compress = {
             fileNamePrefix: Utils.padBytesRight("", 155),
         };
 
-        var checksum = 0;
-        for (var key in file) {
-            var bytes = file[key];
+        let checksum = 0;
+        for (const key in file) {
+            const bytes = file[key];
             Array.prototype.forEach.call(bytes, function(b) {
                 if (typeof b.charCodeAt !== "undefined") {
                     checksum += b.charCodeAt();
@@ -455,7 +455,7 @@ const Compress = {
         checksum = Utils.padBytesRight(Utils.padLeft(checksum.toString(8), 7, "0"), 8);
         file.checksum = checksum;
 
-        var tarball = new Tarball();
+        const tarball = new Tarball();
         tarball.writeBytes(file.fileName);
         tarball.writeBytes(file.fileMode);
         tarball.writeBytes(file.ownerUID);
@@ -490,22 +490,22 @@ const Compress = {
      * @returns {html}
      */
     runUntar: function(input, args) {
-        var Stream = function(input) {
+        const Stream = function(input) {
             this.bytes = input;
             this.position = 0;
         };
 
         Stream.prototype.getBytes = function(bytesToGet) {
-            var newPosition = this.position + bytesToGet;
-            var bytes = this.bytes.slice(this.position, newPosition);
+            const newPosition = this.position + bytesToGet;
+            const bytes = this.bytes.slice(this.position, newPosition);
             this.position = newPosition;
             return bytes;
         };
 
         Stream.prototype.readString = function(numBytes) {
-            var result = "";
-            for (var i = this.position; i < this.position + numBytes; i++) {
-                var currentByte = this.bytes[i];
+            let result = "";
+            for (let i = this.position; i < this.position + numBytes; i++) {
+                const currentByte = this.bytes[i];
                 if (currentByte === 0) break;
                 result += String.fromCharCode(currentByte);
             }
@@ -514,7 +514,7 @@ const Compress = {
         };
 
         Stream.prototype.readInt = function(numBytes, base) {
-            var string = this.readString(numBytes);
+            const string = this.readString(numBytes);
             return parseInt(string, base);
         };
 
@@ -522,13 +522,13 @@ const Compress = {
             return this.position < this.bytes.length;
         };
 
-        var stream = new Stream(input),
+        let stream = new Stream(input),
             files = [];
 
         while (stream.hasMore()) {
-            var dataPosition = stream.position + 512;
+            const dataPosition = stream.position + 512;
 
-            var file = {
+            const file = {
                 fileName: stream.readString(100),
                 fileMode: stream.readString(8),
                 ownerUID: stream.readString(8),
@@ -555,7 +555,7 @@ const Compress = {
             if (file.type === "0") {
                 // File
                 files.push(file);
-                var endPosition = stream.position + file.size;
+                let endPosition = stream.position + file.size;
                 if (file.size % 512 !== 0) {
                     endPosition += 512 - (file.size % 512);
                 }

src/core/operations/Convert.js

@@ -65,7 +65,7 @@ const Convert = {
      * @returns {number}
      */
     runDistance: function (input, args) {
-        var inputUnits = args[0],
+        let inputUnits = args[0],
             outputUnits = args[1];
 
         input = input * Convert.DISTANCE_FACTOR[inputUnits];
@@ -146,7 +146,7 @@ const Convert = {
      * @returns {number}
      */
     runDataSize: function (input, args) {
-        var inputUnits = args[0],
+        let inputUnits = args[0],
             outputUnits = args[1];
 
         input = input * Convert.DATA_FACTOR[inputUnits];
@@ -226,7 +226,7 @@ const Convert = {
      * @returns {number}
      */
     runArea: function (input, args) {
-        var inputUnits = args[0],
+        let inputUnits = args[0],
             outputUnits = args[1];
 
         input = input * Convert.AREA_FACTOR[inputUnits];
@@ -337,7 +337,7 @@ const Convert = {
      * @returns {number}
      */
     runMass: function (input, args) {
-        var inputUnits = args[0],
+        let inputUnits = args[0],
             outputUnits = args[1];
 
         input = input * Convert.MASS_FACTOR[inputUnits];
@@ -402,7 +402,7 @@ const Convert = {
      * @returns {number}
      */
     runSpeed: function (input, args) {
-        var inputUnits = args[0],
+        let inputUnits = args[0],
             outputUnits = args[1];
 
         input = input * Convert.SPEED_FACTOR[inputUnits];

src/core/operations/DateTime.js

@@ -23,7 +23,7 @@ const DateTime = {
      * @returns {string}
      */
     runFromUnixTimestamp: function(input, args) {
-        var units = args[0],
+        let units = args[0],
             d;
 
         input = parseFloat(input);
@@ -54,7 +54,7 @@ const DateTime = {
      * @returns {number}
      */
     runToUnixTimestamp: function(input, args) {
-        var units = args[0],
+        let units = args[0],
             d = moment(input);
 
         if (units === "Seconds (s)") {
@@ -129,7 +129,7 @@ const DateTime = {
      * @returns {html}
      */
     runTranslateFormat: function(input, args) {
-        var inputFormat = args[1],
+        let inputFormat = args[1],
             inputTimezone = args[2],
             outputFormat = args[3],
             outputTimezone = args[4],
@@ -154,7 +154,7 @@ const DateTime = {
      * @returns {html}
      */
     runParse: function(input, args) {
-        var inputFormat = args[1],
+        let inputFormat = args[1],
             inputTimezone = args[2],
             date,
             output = "";

src/core/operations/Endian.js

@@ -36,7 +36,7 @@ const Endian = {
      * @returns {string}
      */
     runSwapEndianness: function(input, args) {
-        var dataFormat = args[0],
+        let dataFormat = args[0],
             wordLength = args[1],
             padIncompleteWords = args[2],
             data = [],
@@ -63,7 +63,7 @@ const Endian = {
 
         // Split up into words
         for (i = 0; i < data.length; i += wordLength) {
-            var word = data.slice(i, i + wordLength);
+            const word = data.slice(i, i + wordLength);
 
             // Pad word if too short
             if (padIncompleteWords && word.length < wordLength){

src/core/operations/Entropy.js

@@ -26,7 +26,7 @@ const Entropy = {
      * @returns {html}
      */
     runEntropy: function(input, args) {
-        var chunkSize = args[0],
+        let chunkSize = args[0],
             output = "",
             entropy = Entropy._calcEntropy(input);
 
@@ -58,9 +58,9 @@ const Entropy = {
                 ]);\
             </script>";
 
-        var chunkEntropy = 0;
+        let chunkEntropy = 0;
         if (chunkSize !== 0) {
-            for (var i = 0; i < input.length; i += chunkSize) {
+            for (let i = 0; i < input.length; i += chunkSize) {
                 chunkEntropy = Entropy._calcEntropy(input.slice(i, i+chunkSize));
                 output += "Bytes " + i + " to " + (i+chunkSize) + ": " + chunkEntropy + "\n";
             }
@@ -88,13 +88,14 @@ const Entropy = {
     runFreqDistrib: function (input, args) {
         if (!input.length) return "No data";
 
-        var distrib = new Array(256),
+        let distrib = new Array(256),
             percentages = new Array(256),
             len = input.length,
-            showZeroes = args[0];
+            showZeroes = args[0],
+            i;
 
         // Initialise distrib to 0
-        for (var i = 0; i < 256; i++) {
+        for (i = 0; i < 256; i++) {
             distrib[i] = 0;
         }
 
@@ -104,14 +105,14 @@ const Entropy = {
         }
 
         // Calculate percentages
-        var repr = 0;
+        let repr = 0;
         for (i = 0; i < 256; i++) {
             if (distrib[i] > 0) repr++;
             percentages[i] = distrib[i] / len * 100;
         }
 
         // Print
-        var output = "<canvas id='chart-area'></canvas><br>" +
+        let output = "<canvas id='chart-area'></canvas><br>" +
             "Total data length: " + len +
             "\nNumber of bytes represented: " + repr +
             "\nNumber of bytes not represented: " + (256-repr) +
@@ -147,15 +148,16 @@ const Entropy = {
      * @returns {number}
      */
     _calcEntropy: function(data) {
-        var prob = [],
+        let prob = [],
             uniques = data.unique(),
-            str = Utils.byteArrayToChars(data);
+            str = Utils.byteArrayToChars(data),
+            i;
 
-        for (var i = 0; i < uniques.length; i++) {
+        for (i = 0; i < uniques.length; i++) {
             prob.push(str.count(Utils.chr(uniques[i])) / data.length);
         }
 
-        var entropy = 0,
+        let entropy = 0,
             p;
 
         for (i = 0; i < prob.length; i++) {

src/core/operations/Extract.js

@@ -21,7 +21,7 @@ const Extract = {
      * @returns {string}
      */
     _search: function(input, searchRegex, removeRegex, includeTotal) {
-        var output = "",
+        let output = "",
             total = 0,
             match;
 
@@ -58,7 +58,7 @@ const Extract = {
      * @returns {string}
      */
     runStrings: function(input, args) {
-        var minLen = args[0] || Extract.MIN_STRING_LEN,
+        let minLen = args[0] || Extract.MIN_STRING_LEN,
             displayTotal = args[1],
             strings = "[A-Z\\d/\\-:.,_$%'\"()<>= !\\[\\]{}@]",
             regex = new RegExp(strings + "{" + minLen + ",}", "ig");
@@ -91,7 +91,7 @@ const Extract = {
      * @returns {string}
      */
     runIp: function(input, args) {
-        var includeIpv4  = args[0],
+        let includeIpv4  = args[0],
             includeIpv6  = args[1],
             removeLocal  = args[2],
             displayTotal = args[3],
@@ -108,10 +108,10 @@ const Extract = {
         }
 
         if (ips) {
-            var regex = new RegExp(ips, "ig");
+            const regex = new RegExp(ips, "ig");
 
             if (removeLocal) {
-                var ten = "10\\..+",
+                let ten = "10\\..+",
                     oneninetwo = "192\\.168\\..+",
                     oneseventwo = "172\\.(?:1[6-9]|2\\d|3[01])\\..+",
                     onetwoseven = "127\\..+",
@@ -136,7 +136,7 @@ const Extract = {
      * @returns {string}
      */
     runEmail: function(input, args) {
-        var displayTotal = args[0],
+        let displayTotal = args[0],
             regex = /\w[-.\w]*@[-\w]+(?:\.[-\w]+)*\.[A-Z]{2,4}/ig;
 
         return Extract._search(input, regex, null, displayTotal);
@@ -151,7 +151,7 @@ const Extract = {
      * @returns {string}
      */
     runMac: function(input, args) {
-        var displayTotal = args[0],
+        let displayTotal = args[0],
             regex = /[A-F\d]{2}(?:[:-][A-F\d]{2}){5}/ig;
 
         return Extract._search(input, regex, null, displayTotal);
@@ -166,14 +166,14 @@ const Extract = {
      * @returns {string}
      */
     runUrls: function(input, args) {
-        var displayTotal = args[0],
+        let displayTotal = args[0],
             protocol = "[A-Z]+://",
             hostname = "[-\\w]+(?:\\.\\w[-\\w]*)+",
             port = ":\\d+",
             path = "/[^.!,?;\"'<>()\\[\\]{}\\s\\x7F-\\xFF]*";
 
         path += "(?:[.!,?]+[^.!,?;\"'<>()\\[\\]{}\\s\\x7F-\\xFF]+)*";
-        var regex = new RegExp(protocol + hostname + "(?:" + port +
+        const regex = new RegExp(protocol + hostname + "(?:" + port +
             ")?(?:" + path + ")?", "ig");
         return Extract._search(input, regex, null, displayTotal);
     },
@@ -187,7 +187,7 @@ const Extract = {
      * @returns {string}
      */
     runDomains: function(input, args) {
-        var displayTotal = args[0],
+        let displayTotal = args[0],
             protocol = "https?://",
             hostname = "[-\\w\\.]+",
             tld = "\\.(?:com|net|org|biz|info|co|uk|onion|int|mobi|name|edu|gov|mil|eu|ac|ae|af|de|ca|ch|cn|cy|es|gb|hk|il|in|io|tv|me|nl|no|nz|ro|ru|tr|us|az|ir|kz|uz|pk)+",
@@ -216,7 +216,7 @@ const Extract = {
      * @returns {string}
      */
     runFilePaths: function(input, args) {
-        var includeWinPath = args[0],
+        let includeWinPath = args[0],
             includeUnixPath = args[1],
             displayTotal = args[2],
             winDrive = "[A-Z]:\\\\",
@@ -236,7 +236,7 @@ const Extract = {
         }
 
         if (filePaths) {
-            var regex = new RegExp(filePaths, "ig");
+            const regex = new RegExp(filePaths, "ig");
             return Extract._search(input, regex, null, displayTotal);
         } else {
             return "";
@@ -252,7 +252,7 @@ const Extract = {
      * @returns {string}
      */
     runDates: function(input, args) {
-        var displayTotal = args[0],
+        let displayTotal = args[0],
             date1 = "(?:19|20)\\d\\d[- /.](?:0[1-9]|1[012])[- /.](?:0[1-9]|[12][0-9]|3[01])", // yyyy-mm-dd
             date2 = "(?:0[1-9]|[12][0-9]|3[01])[- /.](?:0[1-9]|1[012])[- /.](?:19|20)\\d\\d", // dd/mm/yyyy
             date3 = "(?:0[1-9]|1[012])[- /.](?:0[1-9]|[12][0-9]|3[01])[- /.](?:19|20)\\d\\d", // mm/dd/yyyy
@@ -270,7 +270,7 @@ const Extract = {
      * @returns {string}
      */
     runAllIdents: function(input, args) {
-        var output = "";
+        let output = "";
         output += "IP addresses\n";
         output += Extract.runIp(input, [true, true, false]);
 

src/core/operations/FileType.js

@@ -20,12 +20,12 @@ const FileType = {
      * @returns {string}
      */
     runDetect: function(input, args) {
-        var type = FileType._magicType(input);
+        const type = FileType._magicType(input);
 
         if (!type) {
             return "Unknown file type. Have you tried checking the entropy of this data to determine whether it might be encrypted or compressed?";
         } else {
-            var output = "File extension: " + type.ext + "\n" +
+            let output = "File extension: " + type.ext + "\n" +
                 "MIME type:      " + type.mime;
 
             if (type.desc && type.desc.length) {
@@ -51,14 +51,14 @@ const FileType = {
      * @returns {string}
      */
     runScanForEmbeddedFiles: function(input, args) {
-        var output = "Scanning data for 'magic bytes' which may indicate embedded files. The following results may be false positives and should not be treat as reliable. Any suffiently long file is likely to contain these magic bytes coincidentally.\n",
+        let output = "Scanning data for 'magic bytes' which may indicate embedded files. The following results may be false positives and should not be treat as reliable. Any suffiently long file is likely to contain these magic bytes coincidentally.\n",
             type,
             ignoreCommon = args[0],
             commonExts = ["ico", "ttf", ""],
             numFound = 0,
             numCommonFound = 0;
 
-        for (var i = 0; i < input.length; i++) {
+        for (let i = 0; i < input.length; i++) {
             type = FileType._magicType(input.slice(i));
             if (type) {
                 if (ignoreCommon && commonExts.indexOf(type.ext) > -1) {

src/core/operations/HTML.js

@@ -31,14 +31,14 @@ const HTML = {
      * @returns {string}
      */
     runToEntity: function(input, args) {
-        var convertAll = args[0],
+        let convertAll = args[0],
             numeric = args[1] === "Numeric entities",
             hexa = args[1] === "Hex entities";
 
-        var charcodes = Utils.strToCharcode(input);
-        var output = "";
+        const charcodes = Utils.strToCharcode(input);
+        let output = "";
 
-        for (var i = 0; i < charcodes.length; i++) {
+        for (let i = 0; i < charcodes.length; i++) {
             if (convertAll && numeric) {
                 output += "&#" + charcodes[i] + ";";
             } else if (convertAll && hexa) {
@@ -77,7 +77,7 @@ const HTML = {
      * @returns {string}
      */
     runFromEntity: function(input, args) {
-        var regex = /&(#?x?[a-zA-Z0-9]{1,8});/g,
+        let regex = /&(#?x?[a-zA-Z0-9]{1,8});/g,
             output = "",
             m,
             i = 0;
@@ -88,16 +88,16 @@ const HTML = {
                 output += input[i++];
 
             // Add match
-            var bite = HTML._entityToByte[m[1]];
+            const bite = HTML._entityToByte[m[1]];
             if (bite) {
                 output += Utils.chr(bite);
             } else if (!bite && m[1][0] === "#" && m[1].length > 1 && /^#\d{1,5}$/.test(m[1])) {
                 // Numeric entity (e.g. &#10;)
-                var num = m[1].slice(1, m[1].length);
+                const num = m[1].slice(1, m[1].length);
                 output += Utils.chr(parseInt(num, 10));
             } else if (!bite && m[1][0] === "#" && m[1].length > 3 && /^#x[\dA-F]{2,8}$/i.test(m[1])) {
                 // Hex entity (e.g. &#x3A;)
-                var hex = m[1].slice(2, m[1].length);
+                const hex = m[1].slice(2, m[1].length);
                 output += Utils.chr(parseInt(hex, 16));
             } else {
                 // Not a valid entity, print as normal
@@ -134,7 +134,7 @@ const HTML = {
      * @returns {string}
      */
     runStripTags: function(input, args) {
-        var removeIndentation = args[0],
+        let removeIndentation = args[0],
             removeLineBreaks = args[1];
 
         input = Utils.stripHtmlTags(input);
@@ -160,7 +160,7 @@ const HTML = {
      * @returns {html}
      */
     runParseColourCode: function(input, args) {
-        var m = null,
+        let m = null,
             r = 0, g = 0, b = 0, a = 1;
 
         // Read in the input
@@ -177,7 +177,7 @@ const HTML = {
             a = m[4] ? parseFloat(m[4]) : 1;
         } else if ((m = input.match(/hsla?\((\d{1,3}(?:\.\d+)?),\s?(\d{1,3}(?:\.\d+)?)%,\s?(\d{1,3}(?:\.\d+)?)%(?:,\s?(\d(?:\.\d+)?))?\)/i))) {
             // HSL or HSLA - hsl(200, 65%, 91%) or hsla(200, 65%, 91%, 1)
-            var h_ = parseFloat(m[1]) / 360,
+            let h_ = parseFloat(m[1]) / 360,
                 s_ = parseFloat(m[2]) / 100,
                 l_ = parseFloat(m[3]) / 100,
                 rgb_ = HTML._hslToRgb(h_, s_, l_);
@@ -188,7 +188,7 @@ const HTML = {
             a = m[4] ? parseFloat(m[4]) : 1;
         } else if ((m = input.match(/cmyk\((\d(?:\.\d+)?),\s?(\d(?:\.\d+)?),\s?(\d(?:\.\d+)?),\s?(\d(?:\.\d+)?)\)/i))) {
             // CMYK - cmyk(0.12, 0.04, 0.00, 0.03)
-            var c_ = parseFloat(m[1]),
+            let c_ = parseFloat(m[1]),
                 m_ = parseFloat(m[2]),
                 y_ = parseFloat(m[3]),
                 k_ = parseFloat(m[4]);
@@ -198,21 +198,22 @@ const HTML = {
             b = Math.round(255 * (1 - y_) * (1 - k_));
         }
 
-        var hsl_ = HTML._rgbToHsl(r, g, b),
+        let hsl_ = HTML._rgbToHsl(r, g, b),
             h = Math.round(hsl_[0] * 360),
             s = Math.round(hsl_[1] * 100),
             l = Math.round(hsl_[2] * 100),
             k = 1 - Math.max(r/255, g/255, b/255),
             c = (1 - r/255 - k) / (1 - k),
-            m = (1 - g/255 - k) / (1 - k), // eslint-disable-line no-redeclare
             y = (1 - b/255 - k) / (1 - k);
 
+        m = (1 - g/255 - k) / (1 - k);
+
         c = isNaN(c) ? "0" : c.toFixed(2);
         m = isNaN(m) ? "0" : m.toFixed(2);
         y = isNaN(y) ? "0" : y.toFixed(2);
         k = k.toFixed(2);
 
-        var hex = "#" +
+        let hex = "#" +
                 Utils.padLeft(Math.round(r).toString(16), 2) +
                 Utils.padLeft(Math.round(g).toString(16), 2) +
                 Utils.padLeft(Math.round(b).toString(16), 2),
@@ -261,12 +262,12 @@ const HTML = {
      * @return {Array} The RGB representation
      */
     _hslToRgb: function(h, s, l){
-        var r, g, b;
+        let r, g, b;
 
         if (s === 0){
             r = g = b = l; // achromatic
         } else {
-            var hue2rgb = function hue2rgb(p, q, t) {
+            const hue2rgb = function hue2rgb(p, q, t) {
                 if (t < 0) t += 1;
                 if (t > 1) t -= 1;
                 if (t < 1/6) return p + (q - p) * 6 * t;
@@ -275,8 +276,8 @@ const HTML = {
                 return p;
             };
 
-            var q = l < 0.5 ? l * (1 + s) : l + s - l * s;
-            var p = 2 * l - q;
+            const q = l < 0.5 ? l * (1 + s) : l + s - l * s;
+            const p = 2 * l - q;
             r = hue2rgb(p, q, h + 1/3);
             g = hue2rgb(p, q, h);
             b = hue2rgb(p, q, h - 1/3);
@@ -302,14 +303,14 @@ const HTML = {
      */
     _rgbToHsl: function(r, g, b) {
         r /= 255; g /= 255; b /= 255;
-        var max = Math.max(r, g, b),
+        let max = Math.max(r, g, b),
             min = Math.min(r, g, b),
             h, s, l = (max + min) / 2;
 
         if (max === min) {
             h = s = 0; // achromatic
         } else {
-            var d = max - min;
+            const d = max - min;
             s = l > 0.5 ? d / (2 - max - min) : d / (max + min);
             switch (max) {
                 case r: h = (g - b) / d + (g < b ? 6 : 0); break;

src/core/operations/HTTP.js

@@ -20,7 +20,7 @@ const HTTP = {
      * @returns {string}
      */
     runStripHeaders: function(input, args) {
-        var headerEnd = input.indexOf("\r\n\r\n");
+        let headerEnd = input.indexOf("\r\n\r\n");
         headerEnd = (headerEnd < 0) ? input.indexOf("\n\n") + 2 : headerEnd + 4;
 
         return (headerEnd < 2) ? input : input.slice(headerEnd, input.length);
@@ -35,7 +35,7 @@ const HTTP = {
      * @returns {string}
      */
     runParseUserAgent: function(input, args) {
-        var ua = UAParser.parse(input);
+        const ua = UAParser.parse(input);
 
         return "Type: " + ua.type + "\n" +
             "Family: " + ua.uaFamily + "\n" +

src/core/operations/Hash.js

@@ -144,7 +144,7 @@ const Hash = {
      */
     runSHA3: function (input, args) {
         input = CryptoJS.enc.Latin1.parse(input);
-        var sha3Length = args[0],
+        let sha3Length = args[0],
             options = {
                 outputLength: parseInt(sha3Length, 10)
             };
@@ -179,9 +179,9 @@ const Hash = {
      * @returns {string}
      */
     runHMAC: function (input, args) {
-        var hashFunc = args[1];
+        const hashFunc = args[1];
         input = CryptoJS.enc.Latin1.parse(input);
-        var execute = {
+        const execute = {
             "MD5": CryptoJS.HmacMD5(input, args[0]),
             "SHA1": CryptoJS.HmacSHA1(input, args[0]),
             "SHA224": CryptoJS.HmacSHA224(input, args[0]),
@@ -203,7 +203,7 @@ const Hash = {
      * @returns {string}
      */
     runAll: function (input, args) {
-        var byteArray = Utils.strToByteArray(input),
+        let byteArray = Utils.strToByteArray(input),
             output = "MD2:         " + Hash.runMD2(input, []) +
                 "\nMD4:         " + Hash.runMD4(input, []) +
                 "\nMD5:         " + Hash.runMD5(input, []) +
@@ -240,7 +240,7 @@ const Hash = {
     runAnalyse: function(input, args) {
         input = input.replace(/\s/g, "");
 
-        var output = "",
+        let output = "",
             byteLength = input.length / 2,
             bitLength = byteLength * 8,
             possibleHashFunctions = [];

src/core/operations/Hexdump.js

@@ -37,19 +37,19 @@ const Hexdump = {
      * @returns {string}
      */
     runTo: function(input, args) {
-        var length = args[0] || Hexdump.WIDTH;
-        var upperCase = args[1];
-        var includeFinalLength = args[2];
-
-        var output = "", padding = 2;
-        for (var i = 0; i < input.length; i += length) {
-            var buff = input.slice(i, i+length);
-            var hexa = "";
-            for (var j = 0; j < buff.length; j++) {
+        const length = args[0] || Hexdump.WIDTH;
+        const upperCase = args[1];
+        const includeFinalLength = args[2];
+
+        let output = "", padding = 2;
+        for (let i = 0; i < input.length; i += length) {
+            const buff = input.slice(i, i+length);
+            let hexa = "";
+            for (let j = 0; j < buff.length; j++) {
                 hexa += Utils.hex(buff[j], padding) + " ";
             }
 
-            var lineNo = Utils.hex(i, 8);
+            let lineNo = Utils.hex(i, 8);
 
             if (upperCase) {
                 hexa = hexa.toUpperCase();
@@ -77,19 +77,19 @@ const Hexdump = {
      * @returns {byteArray}
      */
     runFrom: function(input, args) {
-        var output = [],
+        let output = [],
             regex = /^\s*(?:[\dA-F]{4,16}:?)?\s*((?:[\dA-F]{2}\s){1,8}(?:\s|[\dA-F]{2}-)(?:[\dA-F]{2}\s){1,8}|(?:[\dA-F]{2}\s|[\dA-F]{4}\s)+)/igm,
             block, line;
 
         while ((block = regex.exec(input))) {
             line = Utils.fromHex(block[1].replace(/-/g, " "));
-            for (var i = 0; i < line.length; i++) {
+            for (let i = 0; i < line.length; i++) {
                 output.push(line[i]);
             }
         }
         // Is this a CyberChef hexdump or is it from a different tool?
-        var width = input.indexOf("\n");
-        var w = (width - 13) / 4;
+        const width = input.indexOf("\n");
+        const w = (width - 13) / 4;
         // w should be the specified width of the hexdump and therefore a round number
         if (Math.floor(w) !== w || input.indexOf("\r") !== -1 || output.indexOf(13) !== -1) {
             if (app) app.options.attemptHighlight = false;
@@ -109,7 +109,7 @@ const Hexdump = {
      */
     highlightTo: function(pos, args) {
         // Calculate overall selection
-        var w = args[0] || 16,
+        let w = args[0] || 16,
             width = 14 + (w*4),
             line = Math.floor(pos[0].start / w),
             offset = pos[0].start % w,
@@ -127,8 +127,8 @@ const Hexdump = {
         pos[0].end = line*width + 10 + offset*3 - 1;
 
         // Set up multiple selections for bytes
-        var startLineNum = Math.floor(pos[0].start / width);
-        var endLineNum = Math.floor(pos[0].end / width);
+        let startLineNum = Math.floor(pos[0].start / width);
+        const endLineNum = Math.floor(pos[0].end / width);
 
         if (startLineNum === endLineNum) {
             pos.push(pos[0]);
@@ -146,10 +146,10 @@ const Hexdump = {
         }
 
         // Set up multiple selections for ASCII
-        var len = pos.length, lineNum = 0;
+        let len = pos.length, lineNum = 0;
         start = 0;
         end = 0;
-        for (var i = 1; i < len; i++) {
+        for (let i = 1; i < len; i++) {
             lineNum = Math.floor(pos[i].start / width);
             start = (((pos[i].start - (lineNum * width)) - 10) / 3) + (width - w -2) + (lineNum * width);
             end = (((pos[i].end + 1 - (lineNum * width)) - 10) / 3) + (width - w -2) + (lineNum * width);
@@ -169,11 +169,11 @@ const Hexdump = {
      * @returns {Object[]} pos
      */
     highlightFrom: function(pos, args) {
-        var w = args[0] || 16;
-        var width = 14 + (w*4);
+        const w = args[0] || 16;
+        const width = 14 + (w*4);
 
-        var line = Math.floor(pos[0].start / width);
-        var offset = pos[0].start % width;
+        let line = Math.floor(pos[0].start / width);
+        let offset = pos[0].start % width;
 
         if (offset < 10) { // In line number section
             pos[0].start = line*w;

src/core/operations/IP.js

@@ -38,12 +38,12 @@ const IP = {
      * @returns {string}
      */
     runParseIpRange: function (input, args) {
-        var includeNetworkInfo = args[0],
+        let includeNetworkInfo = args[0],
             enumerateAddresses = args[1],
             allowLargeList = args[2];
 
         // Check what type of input we are looking at
-        var ipv4CidrRegex = /^\s*((?:\d{1,3}\.){3}\d{1,3})\/(\d\d?)\s*$/,
+        let ipv4CidrRegex = /^\s*((?:\d{1,3}\.){3}\d{1,3})\/(\d\d?)\s*$/,
             ipv4RangeRegex = /^\s*((?:\d{1,3}\.){3}\d{1,3})\s*-\s*((?:\d{1,3}\.){3}\d{1,3})\s*$/,
             ipv6CidrRegex = /^\s*(((?=.*::)(?!.*::.+::)(::)?([\dA-F]{1,4}:(:|\b)|){5}|([\dA-F]{1,4}:){6})((([\dA-F]{1,4}((?!\4)::|:\b|(?![\dA-F])))|(?!\3\4)){2}|(((2[0-4]|1\d|[1-9])?\d|25[0-5])\.?\b){4}))\/(\d\d?\d?)\s*$/i,
             ipv6RangeRegex = /^\s*(((?=.*::)(?!.*::[^-]+::)(::)?([\dA-F]{1,4}:(:|\b)|){5}|([\dA-F]{1,4}:){6})((([\dA-F]{1,4}((?!\4)::|:\b|(?![\dA-F])))|(?!\3\4)){2}|(((2[0-4]|1\d|[1-9])?\d|25[0-5])\.?\b){4}))\s*-\s*(((?=.*::)(?!.*::.+::)(::)?([\dA-F]{1,4}:(:|\b)|){5}|([\dA-F]{1,4}:){6})((([\dA-F]{1,4}((?!\17)::|:\b|(?![\dA-F])))|(?!\16\17)){2}|(((2[0-4]|1\d|[1-9])?\d|25[0-5])\.?\b){4}))\s*$/i,
@@ -82,11 +82,11 @@ const IP = {
      * @returns {string}
      */
     runParseIPv6: function (input, args) {
-        var match,
+        let match,
             output = "";
 
         if ((match = IP.IPV6_REGEX.exec(input))) {
-            var ipv6 = IP._strToIpv6(match[1]),
+            let ipv6 = IP._strToIpv6(match[1]),
                 longhand = IP._ipv6ToStr(ipv6),
                 shorthand = IP._ipv6ToStr(ipv6, true);
 
@@ -126,7 +126,7 @@ const IP = {
             } else if (ipv6[0] === 0x2001 && ipv6[1] === 0) {
                 // Teredo tunneling
                 output += "\nTeredo tunneling IPv6 address detected\n";
-                var serverIpv4  = (ipv6[2] << 16) + ipv6[3],
+                let serverIpv4  = (ipv6[2] << 16) + ipv6[3],
                     udpPort     = (~ipv6[5]) & 0xffff,
                     clientIpv4  = ~((ipv6[6] << 16) + ipv6[7]),
                     flagCone    = (ipv6[4] >>> 15) & 1,
@@ -190,7 +190,7 @@ const IP = {
                 output += "\n6to4 transition IPv6 address detected. See RFC 3056 for more details." +
                     "\n6to4 prefix range: 2002::/16";
 
-                var v4Addr = IP._ipv4ToStr((ipv6[1] << 16) + ipv6[2]),
+                let v4Addr = IP._ipv4ToStr((ipv6[1] << 16) + ipv6[2]),
                     slaId = ipv6[3],
                     interfaceIdStr = ipv6[4].toString(16) + ipv6[5].toString(16) + ipv6[6].toString(16) + ipv6[7].toString(16),
                     interfaceId = new BigInteger(interfaceIdStr, 16);
@@ -218,7 +218,7 @@ const IP = {
             if ((ipv6[5] & 0xff === 0xff) && (ipv6[6] >>> 8 === 0xfe)) {
                 output += "\n\nThis IPv6 address contains a modified EUI-64 address, identified by the presence of FF:FE in the 12th and 13th octets.";
 
-                var intIdent = Utils.hex(ipv6[4] >>> 8) + ":" + Utils.hex(ipv6[4] & 0xff) + ":" +
+                let intIdent = Utils.hex(ipv6[4] >>> 8) + ":" + Utils.hex(ipv6[4] & 0xff) + ":" +
                     Utils.hex(ipv6[5] >>> 8) + ":" + Utils.hex(ipv6[5] & 0xff) + ":" +
                     Utils.hex(ipv6[6] >>> 8) + ":" + Utils.hex(ipv6[6] & 0xff) + ":" +
                     Utils.hex(ipv6[7] >>> 8) + ":" + Utils.hex(ipv6[7] & 0xff),
@@ -249,16 +249,18 @@ const IP = {
      * @returns {string}
      */
     runChangeIpFormat: function(input, args) {
-        var inFormat = args[0],
+        let inFormat = args[0],
             outFormat = args[1],
             lines = input.split("\n"),
             output = "",
             j = 0;
 
 
-        for (var i = 0; i < lines.length; i++) {
+        for (let i = 0; i < lines.length; i++) {
             if (lines[i] === "") continue;
-            var baIp = [];
+            let baIp = [];
+            let octets;
+            let decimal;
 
             if (inFormat === outFormat) {
                 output += lines[i] + "\n";
@@ -268,13 +270,13 @@ const IP = {
             // Convert to byte array IP from input format
             switch (inFormat) {
                 case "Dotted Decimal":
-                    var octets = lines[i].split(".");
+                    octets = lines[i].split(".");
                     for (j = 0; j < octets.length; j++) {
                         baIp.push(parseInt(octets[j], 10));
                     }
                     break;
                 case "Decimal":
-                    var decimal = lines[i].toString();
+                    decimal = lines[i].toString();
                     baIp.push(decimal >> 24 & 255);
                     baIp.push(decimal >> 16 & 255);
                     baIp.push(decimal >> 8 & 255);
@@ -287,21 +289,25 @@ const IP = {
                     throw "Unsupported input IP format";
             }
 
+            let ddIp;
+            let decIp;
+            let hexIp;
+
             // Convert byte array IP to output format
             switch (outFormat) {
                 case "Dotted Decimal":
-                    var ddIp = "";
+                    ddIp = "";
                     for (j = 0; j < baIp.length; j++) {
                         ddIp += baIp[j] + ".";
                     }
                     output += ddIp.slice(0, ddIp.length-1) + "\n";
                     break;
                 case "Decimal":
-                    var decIp = ((baIp[0] << 24) | (baIp[1] << 16) | (baIp[2] << 8) | baIp[3]) >>> 0;
+                    decIp = ((baIp[0] << 24) | (baIp[1] << 16) | (baIp[2] << 8) | baIp[3]) >>> 0;
                     output += decIp.toString() + "\n";
                     break;
                 case "Hex":
-                    var hexIp = "";
+                    hexIp = "";
                     for (j = 0; j < baIp.length; j++) {
                         hexIp += Utils.hex(baIp[j]);
                     }
@@ -340,7 +346,7 @@ const IP = {
      * @returns {string}
      */
     runGroupIps: function(input, args) {
-        var delim = Utils.charRep[args[0]],
+        let delim = Utils.charRep[args[0]],
             cidr = args[1],
             onlySubnets = args[2],
             ipv4Mask = cidr < 32 ? ~(0xFFFFFFFF >>> cidr) : 0xFFFFFFFF,
@@ -352,14 +358,15 @@ const IP = {
             output = "",
             ip = null,
             network = null,
-            networkStr = "";
+            networkStr = "",
+            i;
 
         if (cidr < 0 || cidr > 127) {
             return "CIDR must be less than 32 for IPv4 or 128 for IPv6";
         }
 
         // Parse all IPs and add to network dictionary
-        for (var i = 0; i < ips.length; i++) {
+        for (i = 0; i < ips.length; i++) {
             if ((match = IP.IPV4_REGEX.exec(ips[i]))) {
                 ip = IP._strToIpv4(match[1]) >>> 0;
                 network = ip & ipv4Mask;
@@ -374,7 +381,7 @@ const IP = {
                 network = [];
                 networkStr = "";
 
-                for (var j = 0; j < 8; j++) {
+                for (let j = 0; j < 8; j++) {
                     network.push(ip[j] & ipv6Mask[j]);
                 }
 
@@ -434,7 +441,7 @@ const IP = {
      * @returns {html}
      */
     runParseIPv4Header: function(input, args) {
-        var format = args[0],
+        let format = args[0],
             output;
 
         if (format === "Hex") {
@@ -445,7 +452,7 @@ const IP = {
             return "Unrecognised input format.";
         }
 
-        var version = (input[0] >>> 4) & 0x0f,
+        let version = (input[0] >>> 4) & 0x0f,
             ihl = input[0] & 0x0f,
             dscp = (input[1] >>> 2) & 0x3f,
             ecn = input[1] & 0x03,
@@ -471,15 +478,15 @@ const IP = {
             ihl = ihl + " (Error: this should always be at least 5)";
         } else if (ihl > 5) {
             // sort out options...
-            var optionsLen = ihl * 4 - 20;
+            const optionsLen = ihl * 4 - 20;
             options = input.slice(20, optionsLen + 20);
         }
 
         // Protocol
-        var protocolInfo = IP._protocolLookup[protocol] || {keyword: "", protocol: ""};
+        const protocolInfo = IP._protocolLookup[protocol] || {keyword: "", protocol: ""};
 
         // Checksum
-        var correctChecksum = Checksum.runTCPIP(checksumHeader, []),
+        let correctChecksum = Checksum.runTCPIP(checksumHeader, []),
             givenChecksum = Utils.hex(checksum),
             checksumResult;
         if (correctChecksum === givenChecksum) {
@@ -534,7 +541,7 @@ const IP = {
      * @returns {string}
      */
     _ipv4CidrRange: function(cidr, includeNetworkInfo, enumerateAddresses, allowLargeList) {
-        var output = "",
+        let output = "",
             network = IP._strToIpv4(cidr[1]),
             cidrRange = parseInt(cidr[2], 10);
 
@@ -542,7 +549,7 @@ const IP = {
             return "IPv4 CIDR must be less than 32";
         }
 
-        var mask = ~(0xFFFFFFFF >>> cidrRange),
+        let mask = ~(0xFFFFFFFF >>> cidrRange),
             ip1 = network & mask,
             ip2 = ip1 | ~mask;
 
@@ -574,7 +581,7 @@ const IP = {
      * @returns {string}
      */
     _ipv6CidrRange: function(cidr, includeNetworkInfo) {
-        var output = "",
+        let output = "",
             network = IP._strToIpv6(cidr[1]),
             cidrRange = parseInt(cidr[cidr.length-1], 10);
 
@@ -582,19 +589,19 @@ const IP = {
             return "IPv6 CIDR must be less than 128";
         }
 
-        var mask = IP._genIpv6Mask(cidrRange),
+        let mask = IP._genIpv6Mask(cidrRange),
             ip1 = new Array(8),
             ip2 = new Array(8),
             totalDiff = "",
             total = new Array(128);
 
-        for (var i = 0; i < 8; i++) {
+        for (let i = 0; i < 8; i++) {
             ip1[i] = network[i] & mask[i];
             ip2[i] = ip1[i] | (~mask[i] & 0x0000FFFF);
             totalDiff = (ip2[i] - ip1[i]).toString(2);
 
             if (totalDiff !== "0") {
-                for (var n = 0; n < totalDiff.length; n++) {
+                for (let n = 0; n < totalDiff.length; n++) {
                     total[i*16 + 16-(totalDiff.length-n)] = totalDiff[n];
                 }
             }
@@ -621,10 +628,10 @@ const IP = {
      * @returns {number[]}
      */
     _genIpv6Mask: function(cidr) {
-        var mask = new Array(8),
+        let mask = new Array(8),
             shift;
 
-        for (var i = 0; i < 8; i++) {
+        for (let i = 0; i < 8; i++) {
             if (cidr > ((i+1)*16)) {
                 mask[i] = 0x0000FFFF;
             } else {
@@ -650,12 +657,12 @@ const IP = {
      * @returns {string}
      */
     _ipv4HyphenatedRange: function(range, includeNetworkInfo, enumerateAddresses, allowLargeList) {
-        var output = "",
+        let output = "",
             ip1 = IP._strToIpv4(range[1]),
             ip2 = IP._strToIpv4(range[2]);
 
         // Calculate mask
-        var diff = ip1 ^ ip2,
+        let diff = ip1 ^ ip2,
             cidr = 32,
             mask = 0;
 
@@ -666,7 +673,7 @@ const IP = {
         }
 
         mask = ~mask >>> 0;
-        var network = ip1 & mask,
+        let network = ip1 & mask,
             subIp1 = network & mask,
             subIp2 = subIp1 | ~mask;
 
@@ -701,21 +708,22 @@ const IP = {
      * @returns {string}
      */
     _ipv6HyphenatedRange: function(range, includeNetworkInfo) {
-        var output = "",
+        let output = "",
             ip1 = IP._strToIpv6(range[1]),
             ip2 = IP._strToIpv6(range[14]);
 
-        var t = "",
-            total = new Array(128);
+        let t = "",
+            total = new Array(128),
+            i;
 
         // Initialise total array to "0"
-        for (var i = 0; i < 128; i++)
+        for (i = 0; i < 128; i++)
             total[i] = "0";
 
         for (i = 0; i < 8; i++) {
             t = (ip2[i] - ip1[i]).toString(2);
             if (t !== "0") {
-                for (var n = 0; n < t.length; n++) {
+                for (let n = 0; n < t.length; n++) {
                     total[i*16 + 16-(t.length-n)] = t[n];
                 }
             }
@@ -743,7 +751,7 @@ const IP = {
      * IP._strToIpv4("10.10.0.0");
      */
     _strToIpv4: function (ipStr) {
-        var blocks = ipStr.split("."),
+        let blocks = ipStr.split("."),
             numBlocks = parseBlocks(blocks),
             result = 0;
 
@@ -761,8 +769,8 @@ const IP = {
             if (blocks.length !== 4)
                 throw "More than 4 blocks.";
 
-            var numBlocks = [];
-            for (var i = 0; i < 4; i++) {
+            const numBlocks = [];
+            for (let i = 0; i < 4; i++) {
                 numBlocks[i] = parseInt(blocks[i], 10);
                 if (numBlocks[i] < 0 || numBlocks[i] > 255)
                     throw "Block out of range.";
@@ -784,7 +792,7 @@ const IP = {
      * IP._ipv4ToStr(168427520);
      */
     _ipv4ToStr: function(ipInt) {
-        var blockA = (ipInt >> 24) & 255,
+        let blockA = (ipInt >> 24) & 255,
             blockB = (ipInt >> 16) & 255,
             blockC = (ipInt >> 8) & 255,
             blockD = ipInt & 255;
@@ -805,12 +813,12 @@ const IP = {
      * IP._strToIpv6("ff00::1111:2222");
      */
     _strToIpv6: function(ipStr) {
-        var blocks = ipStr.split(":"),
+        let blocks = ipStr.split(":"),
             numBlocks = parseBlocks(blocks),
             j = 0,
             ipv6 = new Array(8);
 
-        for (var i = 0; i < 8; i++) {
+        for (let i = 0; i < 8; i++) {
             if (isNaN(numBlocks[j])) {
                 ipv6[i] = 0;
                 if (i === (8-numBlocks.slice(j).length)) j++;
@@ -827,8 +835,8 @@ const IP = {
         function parseBlocks(blocks) {
             if (blocks.length < 3 || blocks.length > 8)
                 throw "Badly formatted IPv6 address.";
-            var numBlocks = [];
-            for (var i = 0; i < blocks.length; i++) {
+            const numBlocks = [];
+            for (let i = 0; i < blocks.length; i++) {
                 numBlocks[i] = parseInt(blocks[i], 16);
                 if (numBlocks[i] < 0 || numBlocks[i] > 65535)
                     throw "Block out of range.";
@@ -854,11 +862,11 @@ const IP = {
      * IP._ipv6ToStr([65280, 0, 0, 0, 0, 0, 4369, 8738], false);
      */
     _ipv6ToStr: function(ipv6, compact) {
-        var output = "",
+        let output = "",
             i = 0;
 
         if (compact) {
-            var start = -1,
+            let start = -1,
                 end = -1,
                 s = 0,
                 e = -1;
@@ -908,7 +916,7 @@ const IP = {
      * IP._generateIpv4Range(1, 3);
      */
     _generateIpv4Range: function(ip, endIp) {
-        var range = [];
+        const range = [];
         if (endIp >= ip) {
             for (; ip <= endIp; ip++) {
                 range.push(IP._ipv4ToStr(ip));

src/core/operations/JS.js

@@ -48,7 +48,7 @@ const JS = {
      * @returns {string}
      */
     runParse: function (input, args) {
-        var parseLoc = args[0],
+        let parseLoc = args[0],
             parseRange = args[1],
             parseTokens = args[2],
             parseComment = args[3],
@@ -96,7 +96,7 @@ const JS = {
      * @returns {string}
      */
     runBeautify: function(input, args) {
-        var beautifyIndent = args[0] || JS.BEAUTIFY_INDENT,
+        let beautifyIndent = args[0] || JS.BEAUTIFY_INDENT,
             quotes = args[1].toLowerCase(),
             beautifySemicolons = args[2],
             beautifyComment = args[3],
@@ -110,7 +110,7 @@ const JS = {
                 comment: true
             });
 
-            var options = {
+            const options = {
                 format: {
                     indent: {
                         style: beautifyIndent
@@ -141,7 +141,7 @@ const JS = {
      * @returns {string}
      */
     runMinify: function(input, args) {
-        var result = "",
+        let result = "",
             AST = esprima.parse(input),
             optimisedAST = esmangle.optimize(AST, null),
             mangledAST = esmangle.mangle(optimisedAST);

src/core/operations/MAC.js

@@ -45,7 +45,7 @@ const MAC = {
     runFormat: function(input, args) {
         if (!input) return "";
 
-        var outputCase = args[0],
+        let outputCase = args[0],
             noDelim = args[1],
             dashDelim = args[2],
             colonDelim = args[3],
@@ -54,7 +54,7 @@ const MAC = {
             macs = input.toLowerCase().split(/[,\s\r\n]+/);
 
         macs.forEach(function(mac) {
-            var cleanMac = mac.replace(/[:.-]+/g, ""),
+            let cleanMac = mac.replace(/[:.-]+/g, ""),
                 macHyphen = cleanMac.replace(/(.{2}(?=.))/g, "$1-"),
                 macColon = cleanMac.replace(/(.{2}(?=.))/g, "$1:"),
                 macCisco = cleanMac.replace(/(.{4}(?=.))/g, "$1.");

src/core/operations/MorseCode.js

@@ -97,19 +97,19 @@ const MorseCode = {
      * @returns {string}
      */
     runTo: function(input, args) {
-        var format = args[0].split("/");
-        var dash = format[0];
-        var dot = format[1];
+        const format = args[0].split("/");
+        const dash = format[0];
+        const dot = format[1];
 
-        var letterDelim = Utils.charRep[args[1]];
-        var wordDelim = Utils.charRep[args[2]];
+        const letterDelim = Utils.charRep[args[1]];
+        const wordDelim = Utils.charRep[args[2]];
 
         input = input.split(/\r?\n/);
         input = Array.prototype.map.call(input, function(line) {
-            var words = line.split(/ +/);
+            let words = line.split(/ +/);
             words = Array.prototype.map.call(words, function(word) {
-                var letters = Array.prototype.map.call(word, function(character) {
-                    var letter = character.toUpperCase();
+                const letters = Array.prototype.map.call(word, function(character) {
+                    const letter = character.toUpperCase();
                     if (typeof MorseCode.MORSE_TABLE[letter] == "undefined") {
                         return "";
                     }
@@ -148,12 +148,12 @@ const MorseCode = {
      * @returns {string}
      */
     runFrom: (function() {
-        var reversedTable = null;
-        var reverseTable = function() {
+        let reversedTable = null;
+        const reverseTable = function() {
             reversedTable = {};
 
-            for (var letter in MorseCode.MORSE_TABLE) {
-                var signal = MorseCode.MORSE_TABLE[letter];
+            for (const letter in MorseCode.MORSE_TABLE) {
+                const signal = MorseCode.MORSE_TABLE[letter];
                 reversedTable[signal] = letter;
             }
         };
@@ -163,17 +163,17 @@ const MorseCode = {
                 reverseTable();
             }
 
-            var letterDelim = Utils.charRep[args[0]];
-            var wordDelim = Utils.charRep[args[1]];
+            const letterDelim = Utils.charRep[args[0]];
+            const wordDelim = Utils.charRep[args[1]];
 
             input = input.replace(/-|‐|−|_|–|—|dash/ig, "<dash>"); //hyphen-minus|hyphen|minus-sign|undersore|en-dash|em-dash
             input = input.replace(/\.|·|dot/ig, "<dot>");
 
-            var words = input.split(wordDelim);
+            let words = input.split(wordDelim);
             words = Array.prototype.map.call(words, function(word) {
-                var signals = word.split(letterDelim);
+                const signals = word.split(letterDelim);
 
-                var letters = signals.map(function(signal) {
+                const letters = signals.map(function(signal) {
                     return reversedTable[signal];
                 });
 

src/core/operations/NetBIOS.js

@@ -23,10 +23,10 @@ const NetBIOS = {
      * @returns {byteArray}
      */
     runEncodeName: function(input, args) {
-        var output = [],
+        let output = [],
             offset = args[0];
 
-        for (var i = 0; i < input.length; i++) {
+        for (let i = 0; i < input.length; i++) {
             output.push((input[i] >> 4) + offset);
             output.push((input[i] & 0xf) + offset);
         }
@@ -43,10 +43,10 @@ const NetBIOS = {
      * @returns {byteArray}
      */
     runDecodeName: function(input, args) {
-        var output = [],
+        let output = [],
             offset = args[0];
 
-        for (var i = 0; i < input.length; i += 2) {
+        for (let i = 0; i < input.length; i += 2) {
             output.push(((input[i] - offset) << 4) |
                         ((input[i + 1] - offset) & 0xf));
         }

src/core/operations/Numberwang.js

@@ -15,7 +15,7 @@ const Numberwang = {
      */
     run: function(input, args) {
         if (!input) return "Let's play Wangernumb!";
-        var match = input.match(/\d+/);
+        const match = input.match(/\d+/);
         if (match) {
             return match[0] + "! That's Numberwang!";
         } else {

src/core/operations/OS.js

@@ -17,7 +17,7 @@ const OS = {
      * @returns {string}
      */
     runParseUnixPerms: function(input, args) {
-        var perms = {
+        let perms = {
                 d : false,  // directory
                 sl : false, // symbolic link
                 np : false, // named pipe
@@ -202,7 +202,7 @@ const OS = {
      * @returns {string}
      */
     _permsToStr: function(perms) {
-        var str = "",
+        let str = "",
             type = "-";
 
         if (perms.d) type = "d";
@@ -263,7 +263,7 @@ const OS = {
      * @returns {string}
      */
     _permsToOctal: function(perms) {
-        var d = 0,
+        let d = 0,
             u = 0,
             g = 0,
             o = 0;

src/core/operations/PublicKey.js

@@ -27,7 +27,7 @@ const PublicKey = {
      * @returns {string}
      */
     runParseX509: function (input, args) {
-        var cert = new r.X509(),
+        let cert = new r.X509(),
             inputFormat = args[0];
 
         if (!input.length) {
@@ -56,7 +56,7 @@ const PublicKey = {
                 throw "Undefined input format";
         }
 
-        var version = r.ASN1HEX.getDecendantHexVByNthList(cert.hex, 0, [0, 0, 0]),
+        let version = r.ASN1HEX.getDecendantHexVByNthList(cert.hex, 0, [0, 0, 0]),
             sn = cert.getSerialNumberHex(),
             algorithm = r.KJUR.asn1.x509.OID.oid2name(r.KJUR.asn1.ASN1Util.oidHexToInt(r.ASN1HEX.getDecendantHexVByNthList(cert.hex, 0, [0, 2, 0]))),
             issuer = cert.getIssuerString(),
@@ -132,7 +132,7 @@ const PublicKey = {
         }
 
         // Format Public Key fields
-        for (var i = 0; i < pkFields.length; i++) {
+        for (let i = 0; i < pkFields.length; i++) {
             pkStr += "  " + pkFields[i].key + ":" +
                 Utils.padLeft(
                     pkFields[i].value + "\n",
@@ -141,12 +141,12 @@ const PublicKey = {
                 );
         }
 
-        var issuerStr = PublicKey._formatDnStr(issuer, 2),
+        let issuerStr = PublicKey._formatDnStr(issuer, 2),
             nbDate = PublicKey._formatDate(notBefore),
             naDate = PublicKey._formatDate(notAfter),
             subjectStr = PublicKey._formatDnStr(subject, 2);
 
-        var output = "Version:          " + (parseInt(version, 16) + 1) + " (0x" + version + ")\n" +
+        const output = "Version:          " + (parseInt(version, 16) + 1) + " (0x" + version + ")\n" +
             "Serial number:    " + new r.BigInteger(sn, 16).toString() + " (0x" + sn + ")\n" +
             "Algorithm ID:     " + algorithm + "\n" +
             "Validity\n" +
@@ -245,7 +245,7 @@ const PublicKey = {
      * @returns {string}
      */
     runParseAsn1HexString: function(input, args) {
-        var truncateLen = args[1],
+        let truncateLen = args[1],
             index = args[0];
         return r.ASN1HEX.dump(input.replace(/\s/g, ""), {
             "ommitLongOctet": truncateLen
@@ -262,14 +262,15 @@ const PublicKey = {
      * @returns {string}
      */
     _formatDnStr: function(dnStr, indent) {
-        var output = "",
+        let output = "",
             fields = dnStr.split(",/|"),
             maxKeyLen = 0,
             key,
             value,
+            i,
             str;
 
-        for (var i = 0; i < fields.length; i++) {
+        for (i = 0; i < fields.length; i++) {
             if (!fields[i].length) continue;
 
             key = fields[i].split("=")[0];
@@ -303,10 +304,10 @@ const PublicKey = {
     _formatByteStr: function(byteStr, length, indent) {
         byteStr = Utils.toHex(Utils.fromHex(byteStr), ":");
         length = length * 3;
-        var output = "";
+        let output = "";
 
-        for (var i = 0; i < byteStr.length; i += length) {
-            var str = byteStr.slice(i, i + length) + "\n";
+        for (let i = 0; i < byteStr.length; i += length) {
+            const str = byteStr.slice(i, i + length) + "\n";
             if (i === 0) {
                 output += str;
             } else {
@@ -347,10 +348,10 @@ export default PublicKey;
  * @returns {string}
  */
 r.X509.hex2dn = function(hDN) {
-    var s = "";
-    var a = r.ASN1HEX.getPosArrayOfChildren_AtObj(hDN, 0);
-    for (var i = 0; i < a.length; i++) {
-        var hRDN = r.ASN1HEX.getHexOfTLV_AtObj(hDN, a[i]);
+    let s = "";
+    const a = r.ASN1HEX.getPosArrayOfChildren_AtObj(hDN, 0);
+    for (let i = 0; i < a.length; i++) {
+        const hRDN = r.ASN1HEX.getHexOfTLV_AtObj(hDN, a[i]);
         s = s + ",/|" + r.X509.hex2rdn(hRDN);
     }
     return s;

src/core/operations/Punycode.js

@@ -26,7 +26,7 @@ const Punycode = {
      * @returns {string}
      */
     runToAscii: function(input, args) {
-        var idn = args[0];
+        const idn = args[0];
 
         if (idn) {
             return punycode.toASCII(input);
@@ -44,7 +44,7 @@ const Punycode = {
      * @returns {string}
      */
     runToUnicode: function(input, args) {
-        var idn = args[0];
+        const idn = args[0];
 
         if (idn) {
             return punycode.toUnicode(input);

src/core/operations/QuotedPrintable.js

@@ -40,7 +40,7 @@ const QuotedPrintable = {
      * @returns {string}
      */
     runTo: function (input, args) {
-        var mimeEncodedStr = QuotedPrintable.mimeEncode(input);
+        let mimeEncodedStr = QuotedPrintable.mimeEncode(input);
 
         // fix line breaks
         mimeEncodedStr = mimeEncodedStr.replace(/\r?\n|\r/g, function() {
@@ -61,7 +61,7 @@ const QuotedPrintable = {
      * @returns {byteArray}
      */
     runFrom: function (input, args) {
-        var str = input.replace(/\=(?:\r?\n|$)/g, "");
+        const str = input.replace(/\=(?:\r?\n|$)/g, "");
         return QuotedPrintable.mimeDecode(str);
     },
 
@@ -73,13 +73,13 @@ const QuotedPrintable = {
      * @returns {byteArray}
      */
     mimeDecode: function(str) {
-        var encodedBytesCount = (str.match(/\=[\da-fA-F]{2}/g) || []).length,
+        let encodedBytesCount = (str.match(/\=[\da-fA-F]{2}/g) || []).length,
             bufferLength = str.length - encodedBytesCount * 2,
             chr, hex,
             buffer = new Array(bufferLength),
             bufferPos = 0;
 
-        for (var i = 0, len = str.length; i < len; i++) {
+        for (let i = 0, len = str.length; i < len; i++) {
             chr = str.charAt(i);
             if (chr === "=" && (hex = str.substr(i + 1, 2)) && /[\da-fA-F]{2}/.test(hex)) {
                 buffer[bufferPos++] = parseInt(hex, 16);
@@ -100,7 +100,7 @@ const QuotedPrintable = {
      * @returns {string}
      */
     mimeEncode: function(buffer) {
-        var ranges = [
+        let ranges = [
                 [0x09],
                 [0x0A],
                 [0x0D],
@@ -113,7 +113,7 @@ const QuotedPrintable = {
             ],
             result = "";
 
-        for (var i = 0, len = buffer.length; i < len; i++) {
+        for (let i = 0, len = buffer.length; i < len; i++) {
             if (this._checkRanges(buffer[i], ranges)) {
                 result += String.fromCharCode(buffer[i]);
                 continue;
@@ -134,7 +134,7 @@ const QuotedPrintable = {
      * @returns {bolean}
      */
     _checkRanges: function(nr, ranges) {
-        for (var i = ranges.length - 1; i >= 0; i--) {
+        for (let i = ranges.length - 1; i >= 0; i--) {
             if (!ranges[i].length)
                 continue;
             if (ranges[i].length === 1 && nr === ranges[i][0])
@@ -157,7 +157,7 @@ const QuotedPrintable = {
      * @returns {string}
      */
     _addSoftLinebreaks: function(str, encoding) {
-        var lineLengthMax = 76;
+        const lineLengthMax = 76;
 
         encoding = (encoding || "base64").toString().toLowerCase().trim();
 
@@ -192,7 +192,7 @@ const QuotedPrintable = {
      * @returns {string}
      */
     _addQPSoftLinebreaks: function(mimeEncodedStr, lineLengthMax) {
-        var pos = 0,
+        let pos = 0,
             len = mimeEncodedStr.length,
             match, code, line,
             lineMargin = Math.floor(lineLengthMax / 3),

src/core/operations/Rotate.js

@@ -32,10 +32,10 @@ const Rotate = {
      * @returns {byteArray}
      */
     _rot: function(data, amount, algo) {
-        var result = [];
-        for (var i = 0; i < data.length; i++) {
-            var b = data[i];
-            for (var j = 0; j < amount; j++) {
+        const result = [];
+        for (let i = 0; i < data.length; i++) {
+            let b = data[i];
+            for (let j = 0; j < amount; j++) {
                 b = algo(b);
             }
             result.push(b);
@@ -100,7 +100,7 @@ const Rotate = {
      * @returns {byteArray}
      */
     runRot13: function(input, args) {
-        var amount = args[2],
+        let amount = args[2],
             output = input,
             chr,
             rot13Lowercase = args[0],
@@ -111,7 +111,7 @@ const Rotate = {
                 amount = 26 - (Math.abs(amount) % 26);
             }
 
-            for (var i = 0; i < input.length; i++) {
+            for (let i = 0; i < input.length; i++) {
                 chr = input[i];
                 if (rot13Upperacse && chr >= 65 && chr <= 90) { // Upper case
                     chr = (chr - 65 + amount) % 26;
@@ -141,7 +141,7 @@ const Rotate = {
      * @returns {byteArray}
      */
     runRot47: function(input, args) {
-        var amount = args[0],
+        let amount = args[0],
             output = input,
             chr;
 
@@ -150,7 +150,7 @@ const Rotate = {
                 amount = 94 - (Math.abs(amount) % 94);
             }
 
-            for (var i = 0; i < input.length; i++) {
+            for (let i = 0; i < input.length; i++) {
                 chr = input[i];
                 if (chr >= 33 && chr <= 126) {
                     chr = (chr - 33 + amount) % 94;
@@ -170,7 +170,7 @@ const Rotate = {
      * @returns {byte}
      */
     _rotr: function(b) {
-        var bit = (b & 1) << 7;
+        const bit = (b & 1) << 7;
         return (b >> 1) | bit;
     },
 
@@ -183,7 +183,7 @@ const Rotate = {
      * @returns {byte}
      */
     _rotl: function(b) {
-        var bit = (b >> 7) & 1;
+        const bit = (b >> 7) & 1;
         return ((b << 1) | bit) & 0xFF;
     },
 
@@ -198,13 +198,13 @@ const Rotate = {
      * @returns {byteArray}
      */
     _rotrWhole: function(data, amount) {
-        var carryBits = 0,
+        let carryBits = 0,
             newByte,
             result = [];
 
         amount = amount % 8;
-        for (var i = 0; i < data.length; i++) {
-            var oldByte = data[i] >>> 0;
+        for (let i = 0; i < data.length; i++) {
+            const oldByte = data[i] >>> 0;
             newByte = (oldByte >> amount) | carryBits;
             carryBits = (oldByte & (Math.pow(2, amount)-1)) << (8-amount);
             result.push(newByte);
@@ -224,13 +224,13 @@ const Rotate = {
      * @returns {byteArray}
      */
     _rotlWhole: function(data, amount) {
-        var carryBits = 0,
+        let carryBits = 0,
             newByte,
             result = [];
 
         amount = amount % 8;
-        for (var i = data.length-1; i >= 0; i--) {
-            var oldByte = data[i];
+        for (let i = data.length-1; i >= 0; i--) {
+            const oldByte = data[i];
             newByte = ((oldByte << amount) | carryBits) & 0xFF;
             carryBits = (oldByte >> (8-amount)) & (Math.pow(2, amount)-1);
             result[i] = (newByte);

src/core/operations/SeqUtils.js

@@ -36,7 +36,7 @@ const SeqUtils = {
      * @returns {string}
      */
     runSort: function (input, args) {
-        var delim = Utils.charRep[args[0]],
+        let delim = Utils.charRep[args[0]],
             sortReverse = args[1],
             order = args[2],
             sorted = input.split(delim);
@@ -62,7 +62,7 @@ const SeqUtils = {
      * @returns {string}
      */
     runUnique: function (input, args) {
-        var delim = Utils.charRep[args[0]];
+        const delim = Utils.charRep[args[0]];
         return input.split(delim).unique().join(delim);
     },
 
@@ -81,12 +81,12 @@ const SeqUtils = {
      * @returns {number}
      */
     runCount: function(input, args) {
-        var search = args[0].string,
+        let search = args[0].string,
             type = args[0].option;
 
         if (type === "Regex" && search) {
             try {
-                var regex = new RegExp(search, "gi"),
+                let regex = new RegExp(search, "gi"),
                     matches = input.match(regex);
                 return matches.length;
             } catch (err) {
@@ -117,11 +117,12 @@ const SeqUtils = {
      * @returns {byteArray}
      */
     runReverse: function (input, args) {
+        let i;
         if (args[0] === "Line") {
-            var lines = [],
+            let lines = [],
                 line = [],
                 result = [];
-            for (var i = 0; i < input.length; i++) {
+            for (i = 0; i < input.length; i++) {
                 if (input[i] === 0x0a) {
                     lines.push(line);
                     line = [];
@@ -150,11 +151,11 @@ const SeqUtils = {
      * @returns {string}
      */
     runAddLineNumbers: function(input, args) {
-        var lines = input.split("\n"),
+        let lines = input.split("\n"),
             output = "",
             width = lines.length.toString().length;
 
-        for (var n = 0; n < lines.length; n++) {
+        for (let n = 0; n < lines.length; n++) {
             output += Utils.pad((n+1).toString(), width, " ") + " " + lines[n] + "\n";
         }
         return output.slice(0, output.length-1);
@@ -207,7 +208,7 @@ const SeqUtils = {
      * @returns {number}
      */
     _ipSort: function(a, b) {
-        var a_ = a.split("."),
+        let a_ = a.split("."),
             b_ = b.split(".");
 
         a_ = a_[0] * 0x1000000 + a_[1] * 0x10000 + a_[2] * 0x100 + a_[3] * 1;

src/core/operations/StrUtils.js

@@ -100,7 +100,7 @@ const StrUtils = {
      * @returns {html}
      */
     runRegex: function(input, args) {
-        var userRegex = args[1],
+        let userRegex = args[1],
             i = args[2],
             m = args[3],
             displayTotal = args[4],
@@ -112,7 +112,7 @@ const StrUtils = {
 
         if (userRegex && userRegex !== "^" && userRegex !== "$") {
             try {
-                var regex = new RegExp(userRegex, modifiers);
+                const regex = new RegExp(userRegex, modifiers);
 
                 switch (outputFormat) {
                     case "Highlight matches":
@@ -149,7 +149,7 @@ const StrUtils = {
      * @returns {string}
      */
     runUpper: function (input, args) {
-        var scope = args[0];
+        const scope = args[0];
 
         switch (scope) {
             case "Word":
@@ -213,7 +213,7 @@ const StrUtils = {
      * @returns {string}
      */
     runFindReplace: function(input, args) {
-        var find = args[0].string,
+        let find = args[0].string,
             type = args[0].option,
             replace = args[1],
             g = args[2],
@@ -257,7 +257,7 @@ const StrUtils = {
      * @returns {string}
      */
     runSplit: function(input, args) {
-        var splitDelim = args[0] || StrUtils.SPLIT_DELIM,
+        let splitDelim = args[0] || StrUtils.SPLIT_DELIM,
             joinDelim = Utils.charRep[args[1]],
             sections = input.split(splitDelim);
 
@@ -274,16 +274,17 @@ const StrUtils = {
      * @returns {string}
      */
     runFilter: function(input, args) {
-        var delim = Utils.charRep[args[0]],
+        let delim = Utils.charRep[args[0]],
+            regex,
             reverse = args[2];
 
         try {
-            var regex = new RegExp(args[1]);
+            regex = new RegExp(args[1]);
         } catch (err) {
             return "Invalid regex. Details: " + err.message;
         }
 
-        var regexFilter = function(value) {
+        const regexFilter = function(value) {
             return reverse ^ regex.test(value);
         };
 
@@ -310,7 +311,7 @@ const StrUtils = {
      * @returns {html}
      */
     runDiff: function(input, args) {
-        var sampleDelim = args[0],
+        let sampleDelim = args[0],
             diffBy = args[1],
             showAdded = args[2],
             showRemoved = args[3],
@@ -354,7 +355,7 @@ const StrUtils = {
                 return "Invalid 'Diff by' option.";
         }
 
-        for (var i = 0; i < diff.length; i++) {
+        for (let i = 0; i < diff.length; i++) {
             if (diff[i].added) {
                 if (showAdded) output += "<span class='hlgreen'>" + Utils.escapeHtml(diff[i].value) + "</span>";
             } else if (diff[i].removed) {
@@ -382,7 +383,7 @@ const StrUtils = {
      * @returns {html}
      */
     runOffsetChecker: function(input, args) {
-        var sampleDelim = args[0],
+        let sampleDelim = args[0],
             samples = input.split(sampleDelim),
             outputs = [],
             i = 0,
@@ -526,7 +527,7 @@ const StrUtils = {
      * @returns {string}
      */
     _regexHighlight: function(input, regex, displayTotal) {
-        var output = "",
+        let output = "",
             m,
             hl = 1,
             i = 0,
@@ -568,7 +569,7 @@ const StrUtils = {
      * @returns {string}
      */
     _regexList: function(input, regex, displayTotal, matches, captureGroups) {
-        var output = "",
+        let output = "",
             total = 0,
             match;
 
@@ -578,7 +579,7 @@ const StrUtils = {
                 output += match[0] + "\n";
             }
             if (captureGroups) {
-                for (var i = 1; i < match.length; i++) {
+                for (let i = 1; i < match.length; i++) {
                     if (matches) {
                         output += "  Group " + i + ": ";
                     }

src/core/operations/Tidy.js

@@ -51,7 +51,7 @@ const Tidy = {
      * @returns {string}
      */
     runRemoveWhitespace: function (input, args) {
-        var removeSpaces = args[0],
+        let removeSpaces = args[0],
             removeCariageReturns = args[1],
             removeLineFeeds = args[2],
             removeTabs = args[3],
@@ -77,8 +77,8 @@ const Tidy = {
      * @returns {byteArray}
      */
     runRemoveNulls: function (input, args) {
-        var output = [];
-        for (var i = 0; i < input.length; i++) {
+        const output = [];
+        for (let i = 0; i < input.length; i++) {
             if (input[i] !== 0) output.push(input[i]);
         }
         return output;
@@ -109,7 +109,7 @@ const Tidy = {
      * @returns {byteArray}
      */
     runDropBytes: function(input, args) {
-        var start = args[0],
+        let start = args[0],
             length = args[1],
             applyToEachLine = args[2];
 
@@ -120,10 +120,11 @@ const Tidy = {
             return input.slice(0, start).concat(input.slice(start+length, input.length));
 
         // Split input into lines
-        var lines = [],
-            line = [];
+        let lines = [],
+            line = [],
+            i;
 
-        for (var i = 0; i < input.length; i++) {
+        for (i = 0; i < input.length; i++) {
             if (input[i] === 0x0a) {
                 lines.push(line);
                 line = [];
@@ -133,7 +134,7 @@ const Tidy = {
         }
         lines.push(line);
 
-        var output = [];
+        let output = [];
         for (i = 0; i < lines.length; i++) {
             output = output.concat(lines[i].slice(0, start).concat(lines[i].slice(start+length, lines[i].length)));
             output.push(0x0a);
@@ -161,7 +162,7 @@ const Tidy = {
      * @returns {byteArray}
      */
     runTakeBytes: function(input, args) {
-        var start = args[0],
+        let start = args[0],
             length = args[1],
             applyToEachLine = args[2];
 
@@ -172,10 +173,11 @@ const Tidy = {
             return input.slice(start, start+length);
 
         // Split input into lines
-        var lines = [],
+        let lines = [],
             line = [];
+        let i;
 
-        for (var i = 0; i < input.length; i++) {
+        for (i = 0; i < input.length; i++) {
             if (input[i] === 0x0a) {
                 lines.push(line);
                 line = [];
@@ -185,7 +187,7 @@ const Tidy = {
         }
         lines.push(line);
 
-        var output = [];
+        let output = [];
         for (i = 0; i < lines.length; i++) {
             output = output.concat(lines[i].slice(start, start+length));
             output.push(0x0a);
@@ -218,7 +220,7 @@ const Tidy = {
      * @returns {string}
      */
     runPad: function(input, args) {
-        var position = args[0],
+        let position = args[0],
             len = args[1],
             chr = args[2],
             lines = input.split("\n"),

src/core/operations/URL.js

@@ -28,7 +28,7 @@ const URL_ = {
      * @returns {string}
      */
     runTo: function(input, args) {
-        var encodeAll = args[0];
+        const encodeAll = args[0];
         return encodeAll ? URL_._encodeAllChars(input) : encodeURI(input);
     },
 
@@ -41,7 +41,7 @@ const URL_ = {
      * @returns {string}
      */
     runFrom: function(input, args) {
-        var data = input.replace(/\+/g, "%20");
+        const data = input.replace(/\+/g, "%20");
         try {
             return decodeURIComponent(data);
         } catch (err) {
@@ -62,14 +62,14 @@ const URL_ = {
             throw "This operation only works in a browser.";
         }
 
-        var a = document.createElement("a");
+        const a = document.createElement("a");
 
         // Overwrite base href which will be the current CyberChef URL to reduce confusion.
         a.href = "http://example.com/";
         a.href = input;
 
         if (a.protocol) {
-            var output = "";
+            let output = "";
             if (a.hostname !== window.location.hostname) {
                 output = "Protocol:\t" + a.protocol + "\n";
                 if (a.hostname) output += "Hostname:\t" + a.hostname + "\n";
@@ -77,7 +77,7 @@ const URL_ = {
             }
 
             if (a.pathname && a.pathname !== window.location.pathname) {
-                var pathname = a.pathname;
+                let pathname = a.pathname;
                 if (pathname.indexOf(window.location.pathname) === 0)
                     pathname = pathname.replace(window.location.pathname, "");
                 if (pathname)
@@ -90,9 +90,9 @@ const URL_ = {
 
             if (a.search && a.search !== window.location.search) {
                 output += "Arguments:\n";
-                var args_ = (a.search.slice(1, a.search.length)).split("&");
-                var splitArgs = [], padding = 0;
-                for (var i = 0; i < args_.length; i++) {
+                const args_ = (a.search.slice(1, a.search.length)).split("&");
+                let splitArgs = [], padding = 0, i;
+                for (i = 0; i < args_.length; i++) {
                     splitArgs.push(args_[i].split("="));
                     padding = (splitArgs[i][0].length > padding) ? splitArgs[i][0].length : padding;
                 }

src/core/operations/UUID.js

@@ -18,18 +18,18 @@ const UUID = {
      */
     runGenerateV4: function(input, args) {
         if (window && typeof(window.crypto) !== "undefined" && typeof(window.crypto.getRandomValues) !== "undefined") {
-            var buf = new Uint32Array(4),
+            let buf = new Uint32Array(4),
                 i = 0;
             window.crypto.getRandomValues(buf);
             return "xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx".replace(/[xy]/g, function(c) {
-                var r = (buf[i >> 3] >> ((i % 8) * 4)) & 0xf,
+                let r = (buf[i >> 3] >> ((i % 8) * 4)) & 0xf,
                     v = c === "x" ? r : (r & 0x3 | 0x8);
                 i++;
                 return v.toString(16);
             });
         } else {
             return "xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx".replace(/[xy]/g, function(c) {
-                var r = Math.random() * 16 | 0,
+                let r = Math.random() * 16 | 0,
                     v = c === "x" ? r : (r & 0x3 | 0x8);
                 return v.toString(16);
             });

src/core/operations/Unicode.js

@@ -26,7 +26,7 @@ const Unicode = {
      * @returns {string}
      */
     runUnescape: function(input, args) {
-        var prefix = Unicode._prefixToRegex[args[0]],
+        let prefix = Unicode._prefixToRegex[args[0]],
             regex = new RegExp(prefix+"([a-f\\d]{4,6})", "ig"),
             output = "",
             m,

src/node/index.js

@@ -7,7 +7,7 @@
  */
 require("babel-polyfill");
 
-var Chef = require("../core/Chef.js").default;
+const Chef = require("../core/Chef.js").default;
 
 const CyberChef = module.exports = {
 

src/web/App.js

@@ -20,7 +20,7 @@ import Split from "split.js";
  * @param {String[]} defaultFavourites - A list of default favourite operations.
  * @param {Object} options - Default setting for app options.
  */
-var App = function(categories, operations, defaultFavourites, defaultOptions) {
+const App = function(categories, operations, defaultFavourites, defaultOptions) {
     this.categories  = categories;
     this.operations  = operations;
     this.dfavourites = defaultFavourites;
@@ -62,7 +62,7 @@ App.prototype.setup = function() {
  */
 App.prototype.handleError = function(err) {
     console.error(err);
-    var msg = err.displayStr || err.toString();
+    const msg = err.displayStr || err.toString();
     this.alert(msg, "danger", this.options.errorTimeout, !this.options.showErrors);
 };
 
@@ -74,7 +74,7 @@ App.prototype.handleError = function(err) {
  *   whole recipe.
  */
 App.prototype.bake = function(step) {
-    var response;
+    let response;
 
     try {
         response = this.chef.bake(
@@ -129,7 +129,7 @@ App.prototype.autoBake = function() {
  * @returns {number} - The number of miliseconds it took to run the silent bake.
  */
 App.prototype.silentBake = function() {
-    var startTime = new Date().getTime(),
+    let startTime = new Date().getTime(),
         recipeConfig = this.getRecipeConfig();
 
     if (this.autoBake_) {
@@ -146,7 +146,7 @@ App.prototype.silentBake = function() {
  * @returns {string}
  */
 App.prototype.getInput = function() {
-    var input = this.manager.input.get();
+    const input = this.manager.input.get();
 
     // Save to session storage in case we need to restore it later
     sessionStorage.setItem("inputLength", input.length);
@@ -178,15 +178,16 @@ App.prototype.populateOperationsList = function() {
     // Move edit button away before we overwrite it
     document.body.appendChild(document.getElementById("edit-favourites"));
 
-    var html = "";
+    let html = "";
+    let i;
 
-    for (var i = 0; i < this.categories.length; i++) {
-        var catConf = this.categories[i],
+    for (i = 0; i < this.categories.length; i++) {
+        let catConf = this.categories[i],
             selected = i === 0,
             cat = new HTMLCategory(catConf.name, selected);
 
-        for (var j = 0; j < catConf.ops.length; j++) {
-            var opName = catConf.ops[j],
+        for (let j = 0; j < catConf.ops.length; j++) {
+            let opName = catConf.ops[j],
                 op = new HTMLOperation(opName, this.operations[opName], this, this.manager);
             cat.addOperation(op);
         }
@@ -196,7 +197,7 @@ App.prototype.populateOperationsList = function() {
 
     document.getElementById("categories").innerHTML = html;
 
-    var opLists = document.querySelectorAll("#categories .op-list");
+    const opLists = document.querySelectorAll("#categories .op-list");
 
     for (i = 0; i < opLists.length; i++) {
         opLists[i].dispatchEvent(this.manager.oplistcreate);
@@ -236,7 +237,7 @@ App.prototype.initialiseSplitter = function() {
  */
 App.prototype.loadLocalStorage = function() {
     // Load options
-    var lOptions;
+    let lOptions;
     if (localStorage.options !== undefined) {
         lOptions = JSON.parse(localStorage.options);
     }
@@ -253,7 +254,7 @@ App.prototype.loadLocalStorage = function() {
  * If the user currently has no saved favourites, the defaults from the view constructor are used.
  */
 App.prototype.loadFavourites = function() {
-    var favourites = localStorage.favourites &&
+    let favourites = localStorage.favourites &&
         localStorage.favourites.length > 2 ?
         JSON.parse(localStorage.favourites) :
         this.dfavourites;
@@ -261,7 +262,7 @@ App.prototype.loadFavourites = function() {
     favourites = this.validFavourites(favourites);
     this.saveFavourites(favourites);
 
-    var favCat = this.categories.filter(function(c) {
+    const favCat = this.categories.filter(function(c) {
         return c.name === "Favourites";
     })[0];
 
@@ -284,8 +285,8 @@ App.prototype.loadFavourites = function() {
  * @returns {string[]} A list of the valid favourites
  */
 App.prototype.validFavourites = function(favourites) {
-    var validFavs = [];
-    for (var i = 0; i < favourites.length; i++) {
+    const validFavs = [];
+    for (let i = 0; i < favourites.length; i++) {
         if (this.operations.hasOwnProperty(favourites[i])) {
             validFavs.push(favourites[i]);
         } else {
@@ -325,7 +326,7 @@ App.prototype.resetFavourites = function() {
  * @param {string} name - The name of the operation
  */
 App.prototype.addFavourite = function(name) {
-    var favourites = JSON.parse(localStorage.favourites);
+    const favourites = JSON.parse(localStorage.favourites);
 
     if (favourites.indexOf(name) >= 0) {
         this.alert("'" + name + "' is already in your favourites", "info", 2000);
@@ -347,9 +348,9 @@ App.prototype.loadURIParams = function() {
     // Load query string from URI
     this.queryString = (function(a) {
         if (a === "") return {};
-        var b = {};
-        for (var i = 0; i < a.length; i++) {
-            var p = a[i].split("=");
+        const b = {};
+        for (let i = 0; i < a.length; i++) {
+            const p = a[i].split("=");
             if (p.length !== 2) {
                 b[a[i]] = true;
             } else {
@@ -360,13 +361,13 @@ App.prototype.loadURIParams = function() {
     })(window.location.search.substr(1).split("&"));
 
     // Turn off auto-bake while loading
-    var autoBakeVal = this.autoBake_;
+    const autoBakeVal = this.autoBake_;
     this.autoBake_ = false;
 
     // Read in recipe from query string
     if (this.queryString.recipe) {
         try {
-            var recipeConfig = JSON.parse(this.queryString.recipe);
+            const recipeConfig = JSON.parse(this.queryString.recipe);
             this.setRecipeConfig(recipeConfig);
         } catch (err) {}
     } else if (this.queryString.op) {
@@ -376,13 +377,13 @@ App.prototype.loadURIParams = function() {
             this.manager.recipe.addOperation(this.queryString.op);
         } catch (err) {
             // If no exact match, search for nearest match and add that
-            var matchedOps = this.manager.ops.filterOperations(this.queryString.op, false);
+            const matchedOps = this.manager.ops.filterOperations(this.queryString.op, false);
             if (matchedOps.length) {
                 this.manager.recipe.addOperation(matchedOps[0].name);
             }
 
             // Populate search with the string
-            var search = document.getElementById("search");
+            const search = document.getElementById("search");
 
             search.value = this.queryString.op;
             search.dispatchEvent(new Event("search"));
@@ -392,7 +393,7 @@ App.prototype.loadURIParams = function() {
     // Read in input data from query string
     if (this.queryString.input) {
         try {
-            var inputData = Utils.fromBase64(this.queryString.input);
+            const inputData = Utils.fromBase64(this.queryString.input);
             this.setInput(inputData);
         } catch (err) {}
     }
@@ -419,7 +420,7 @@ App.prototype.nextIngId = function() {
  * @returns {Object[]}
  */
 App.prototype.getRecipeConfig = function() {
-    var recipeConfig = this.manager.recipe.getConfig();
+    const recipeConfig = this.manager.recipe.getConfig();
     sessionStorage.setItem("recipeConfig", JSON.stringify(recipeConfig));
     return recipeConfig;
 };
@@ -434,12 +435,12 @@ App.prototype.setRecipeConfig = function(recipeConfig) {
     sessionStorage.setItem("recipeConfig", JSON.stringify(recipeConfig));
     document.getElementById("rec-list").innerHTML = null;
 
-    for (var i = 0; i < recipeConfig.length; i++) {
-        var item = this.manager.recipe.addOperation(recipeConfig[i].op);
+    for (let i = 0; i < recipeConfig.length; i++) {
+        const item = this.manager.recipe.addOperation(recipeConfig[i].op);
 
         // Populate arguments
-        var args = item.querySelectorAll(".arg");
-        for (var j = 0; j < args.length; j++) {
+        const args = item.querySelectorAll(".arg");
+        for (let j = 0; j < args.length; j++) {
             if (args[j].getAttribute("type") === "checkbox") {
                 // checkbox
                 args[j].checked = recipeConfig[i].args[j];
@@ -485,7 +486,7 @@ App.prototype.resetLayout = function() {
  */
 App.prototype.setCompileMessage = function() {
     // Display time since last build and compile message
-    var now = new Date(),
+    let now = new Date(),
         timeSinceCompile = Utils.fuzzyTime(now.getTime() - window.compileTime),
         compileInfo = "<span style=\"font-weight: normal\">Last build: " +
             timeSinceCompile.substr(0, 1).toUpperCase() + timeSinceCompile.substr(1) + " ago";
@@ -523,7 +524,7 @@ App.prototype.setCompileMessage = function() {
  * this.alert("Happy Christmas!", "info", 5000);
  */
 App.prototype.alert = function(str, style, timeout, silent) {
-    var time = new Date();
+    const time = new Date();
 
     console.log("[" + time.toLocaleString() + "] " + str);
     if (silent) return;
@@ -531,7 +532,7 @@ App.prototype.alert = function(str, style, timeout, silent) {
     style = style || "danger";
     timeout = timeout || 0;
 
-    var alertEl = document.getElementById("alert"),
+    let alertEl = document.getElementById("alert"),
         alertContent = document.getElementById("alert-content");
 
     alertEl.classList.remove("alert-danger");
@@ -649,7 +650,7 @@ App.prototype.callApi = function(url, type, data, dataType, contentType) {
     dataType = dataType || undefined;
     contentType = contentType || "application/json";
 
-    var response = null,
+    let response = null,
         success = false;
 
     $.ajax({

src/web/ControlsWaiter.js

@@ -12,7 +12,7 @@ import Utils from "../core/Utils.js";
  * @param {App} app - The main view object for CyberChef.
  * @param {Manager} manager - The CyberChef event manager.
  */
-var ControlsWaiter = function(app, manager) {
+const ControlsWaiter = function(app, manager) {
     this.app = app;
     this.manager = manager;
 };
@@ -23,7 +23,7 @@ var ControlsWaiter = function(app, manager) {
  * without wrapping or overflowing.
  */
 ControlsWaiter.prototype.adjustWidth = function() {
-    var controls     = document.getElementById("controls"),
+    let controls     = document.getElementById("controls"),
         step         = document.getElementById("step"),
         clrBreaks    = document.getElementById("clr-breaks"),
         saveImg      = document.querySelector("#save img"),
@@ -66,7 +66,7 @@ ControlsWaiter.prototype.adjustWidth = function() {
  * @param {boolean} value - The new value for Auto Bake.
  */
 ControlsWaiter.prototype.setAutoBake = function(value) {
-    var autoBakeCheckbox = document.getElementById("auto-bake");
+    const autoBakeCheckbox = document.getElementById("auto-bake");
 
     if (autoBakeCheckbox.checked !== value) {
         autoBakeCheckbox.click();
@@ -79,7 +79,7 @@ ControlsWaiter.prototype.setAutoBake = function(value) {
  */
 ControlsWaiter.prototype.bakeClick = function() {
     this.app.bake();
-    var outputText = document.getElementById("output-text");
+    const outputText = document.getElementById("output-text");
     outputText.focus();
     outputText.setSelectionRange(0, 0);
 };
@@ -90,7 +90,7 @@ ControlsWaiter.prototype.bakeClick = function() {
  */
 ControlsWaiter.prototype.stepClick = function() {
     this.app.bake(true);
-    var outputText = document.getElementById("output-text");
+    const outputText = document.getElementById("output-text");
     outputText.focus();
     outputText.setSelectionRange(0, 0);
 };
@@ -100,7 +100,7 @@ ControlsWaiter.prototype.stepClick = function() {
  * Handler for changes made to the Auto Bake checkbox.
  */
 ControlsWaiter.prototype.autoBakeChange = function() {
-    var autoBakeLabel    = document.getElementById("auto-bake-label"),
+    let autoBakeLabel    = document.getElementById("auto-bake-label"),
         autoBakeCheckbox = document.getElementById("auto-bake");
 
     this.app.autoBake_ = autoBakeCheckbox.checked;
@@ -128,9 +128,9 @@ ControlsWaiter.prototype.clearRecipeClick = function() {
  * recipe.
  */
 ControlsWaiter.prototype.clearBreaksClick = function() {
-    var bps = document.querySelectorAll("#rec-list li.operation .breakpoint");
+    const bps = document.querySelectorAll("#rec-list li.operation .breakpoint");
 
-    for (var i = 0; i < bps.length; i++) {
+    for (let i = 0; i < bps.length; i++) {
         bps[i].setAttribute("break", "false");
         bps[i].classList.remove("breakpoint-selected");
     }
@@ -145,7 +145,7 @@ ControlsWaiter.prototype.clearBreaksClick = function() {
 ControlsWaiter.prototype.initialiseSaveLink = function(recipeConfig) {
     recipeConfig = recipeConfig || this.app.getRecipeConfig();
 
-    var includeRecipe = document.getElementById("save-link-recipe-checkbox").checked,
+    let includeRecipe = document.getElementById("save-link-recipe-checkbox").checked,
         includeInput = document.getElementById("save-link-input-checkbox").checked,
         saveLinkEl = document.getElementById("save-link"),
         saveLink = this.generateStateUrl(includeRecipe, includeInput, recipeConfig);
@@ -167,7 +167,7 @@ ControlsWaiter.prototype.initialiseSaveLink = function(recipeConfig) {
 ControlsWaiter.prototype.generateStateUrl = function(includeRecipe, includeInput, recipeConfig, baseURL) {
     recipeConfig = recipeConfig || this.app.getRecipeConfig();
 
-    var link = baseURL || window.location.protocol + "//" +
+    let link = baseURL || window.location.protocol + "//" +
                 window.location.host +
                 window.location.pathname,
         recipeStr = JSON.stringify(recipeConfig),
@@ -195,7 +195,7 @@ ControlsWaiter.prototype.generateStateUrl = function(includeRecipe, includeInput
  */
 ControlsWaiter.prototype.saveTextChange = function() {
     try {
-        var recipeConfig = JSON.parse(document.getElementById("save-text").value);
+        const recipeConfig = JSON.parse(document.getElementById("save-text").value);
         this.initialiseSaveLink(recipeConfig);
     } catch (err) {}
 };
@@ -205,7 +205,7 @@ ControlsWaiter.prototype.saveTextChange = function() {
  * Handler for the 'Save' command. Pops up the save dialog box.
  */
 ControlsWaiter.prototype.saveClick = function() {
-    var recipeConfig = this.app.getRecipeConfig(),
+    let recipeConfig = this.app.getRecipeConfig(),
         recipeStr = JSON.stringify(recipeConfig).replace(/},{/g, "},\n{");
 
     document.getElementById("save-text").value = recipeStr;
@@ -244,15 +244,15 @@ ControlsWaiter.prototype.loadClick = function() {
  * Saves the recipe specified in the save textarea to local storage.
  */
 ControlsWaiter.prototype.saveButtonClick = function() {
-    var recipeName = Utils.escapeHtml(document.getElementById("save-name").value),
-        recipeStr  = document.getElementById("save-text").value;
+    let recipeName = Utils.escapeHtml(document.getElementById("save-name").value);
+    let recipeStr  = document.getElementById("save-text").value;
 
     if (!recipeName) {
         this.app.alert("Please enter a recipe name", "danger", 2000);
         return;
     }
 
-    var savedRecipes = localStorage.savedRecipes ?
+    let savedRecipes = localStorage.savedRecipes ?
             JSON.parse(localStorage.savedRecipes) : [],
         recipeId = localStorage.recipeId || 0;
 
@@ -273,20 +273,20 @@ ControlsWaiter.prototype.saveButtonClick = function() {
  * Populates the list of saved recipes in the load dialog box from local storage.
  */
 ControlsWaiter.prototype.populateLoadRecipesList = function() {
-    var loadNameEl = document.getElementById("load-name");
+    const loadNameEl = document.getElementById("load-name");
 
     // Remove current recipes from select
-    var i = loadNameEl.options.length;
+    let i = loadNameEl.options.length;
     while (i--) {
         loadNameEl.remove(i);
     }
 
     // Add recipes to select
-    var savedRecipes = localStorage.savedRecipes ?
+    const savedRecipes = localStorage.savedRecipes ?
             JSON.parse(localStorage.savedRecipes) : [];
 
     for (i = 0; i < savedRecipes.length; i++) {
-        var opt = document.createElement("option");
+        const opt = document.createElement("option");
         opt.value = savedRecipes[i].id;
         // Unescape then re-escape in case localStorage has been corrupted
         opt.innerHTML = Utils.escapeHtml(Utils.unescapeHtml(savedRecipes[i].name));
@@ -303,7 +303,7 @@ ControlsWaiter.prototype.populateLoadRecipesList = function() {
  * Removes the currently selected recipe from local storage.
  */
 ControlsWaiter.prototype.loadDeleteClick = function() {
-    var id = parseInt(document.getElementById("load-name").value, 10),
+    let id = parseInt(document.getElementById("load-name").value, 10),
         savedRecipes = localStorage.savedRecipes ?
             JSON.parse(localStorage.savedRecipes) : [];
 
@@ -320,12 +320,12 @@ ControlsWaiter.prototype.loadDeleteClick = function() {
  * Displays the selected recipe in the load text box.
  */
 ControlsWaiter.prototype.loadNameChange = function(e) {
-    var el = e.target,
+    let el = e.target,
         savedRecipes = localStorage.savedRecipes ?
             JSON.parse(localStorage.savedRecipes) : [],
         id = parseInt(el.value, 10);
 
-    var recipe = savedRecipes.filter(function(r) {
+    const recipe = savedRecipes.filter(function(r) {
         return r.id === id;
     })[0];
 
@@ -338,7 +338,7 @@ ControlsWaiter.prototype.loadNameChange = function(e) {
  */
 ControlsWaiter.prototype.loadButtonClick = function() {
     try {
-        var recipeConfig = JSON.parse(document.getElementById("load-text").value);
+        const recipeConfig = JSON.parse(document.getElementById("load-text").value);
         this.app.setRecipeConfig(recipeConfig);
 
         $("#rec-list [data-toggle=popover]").popover();
@@ -352,7 +352,7 @@ ControlsWaiter.prototype.loadButtonClick = function() {
  * Populates the bug report information box with useful technical info.
  */
 ControlsWaiter.prototype.supportButtonClick = function() {
-    var reportBugInfo = document.getElementById("report-bug-info"),
+    let reportBugInfo = document.getElementById("report-bug-info"),
         saveLink = this.generateStateUrl(true, true, null, "https://gchq.github.io/CyberChef/");
 
     reportBugInfo.innerHTML = "* CyberChef compile time: " + COMPILE_TIME + "\n" +

src/web/HTMLCategory.js

@@ -9,7 +9,7 @@
  * @param {string} name - The name of the category.
  * @param {boolean} selected - Whether this category is pre-selected or not.
  */
-var HTMLCategory = function(name, selected) {
+const HTMLCategory = function(name, selected) {
     this.name = name;
     this.selected = selected;
     this.opList = [];
@@ -32,8 +32,8 @@ HTMLCategory.prototype.addOperation = function(operation) {
  * @returns {string}
  */
 HTMLCategory.prototype.toHtml = function() {
-    var catName = "cat" + this.name.replace(/[\s/-:_]/g, "");
-    var html = "<div class='panel category'>\
+    const catName = "cat" + this.name.replace(/[\s/-:_]/g, "");
+    let html = "<div class='panel category'>\
         <a class='category-title' data-toggle='collapse'\
             data-parent='#categories' href='#" + catName + "'>\
             " + this.name + "\
@@ -41,7 +41,7 @@ HTMLCategory.prototype.toHtml = function() {
         <div id='" + catName + "' class='panel-collapse collapse\
         " + (this.selected ? " in" : "") + "'><ul class='op-list'>";
 
-    for (var i = 0; i < this.opList.length; i++) {
+    for (let i = 0; i < this.opList.length; i++) {
         html += this.opList[i].toStubHtml();
     }
 

src/web/HTMLIngredient.js

@@ -10,7 +10,7 @@
  * @param {App} app - The main view object for CyberChef.
  * @param {Manager} manager - The CyberChef event manager.
  */
-var HTMLIngredient = function(config, app, manager) {
+const HTMLIngredient = function(config, app, manager) {
     this.app = app;
     this.manager = manager;
 
@@ -32,7 +32,7 @@ var HTMLIngredient = function(config, app, manager) {
  * @returns {string}
  */
 HTMLIngredient.prototype.toHtml = function() {
-    var inline = (this.type === "boolean" ||
+    let inline = (this.type === "boolean" ||
                   this.type === "number" ||
                   this.type === "option" ||
                   this.type === "shortString" ||
@@ -158,15 +158,15 @@ HTMLIngredient.prototype.toHtml = function() {
  * @param {event} e
  */
 HTMLIngredient.prototype.toggleDisableArgs = function(e) {
-    var el = e.target,
+    let el = e.target,
         op = el.parentNode.parentNode,
         args = op.querySelectorAll(".arg-group"),
         els;
 
-    for (var i = 0; i < this.disableArgs.length; i++) {
+    for (let i = 0; i < this.disableArgs.length; i++) {
         els = args[this.disableArgs[i]].querySelectorAll("input, select, button");
 
-        for (var j = 0; j < els.length; j++) {
+        for (let j = 0; j < els.length; j++) {
             if (els[j].getAttribute("disabled")) {
                 els[j].removeAttribute("disabled");
             } else {
@@ -186,7 +186,7 @@ HTMLIngredient.prototype.toggleDisableArgs = function(e) {
  * @param {event} e
  */
 HTMLIngredient.prototype.populateOptionChange = function(e) {
-    var el = e.target,
+    let el = e.target,
         op = el.parentNode.parentNode,
         target = op.querySelectorAll(".arg-group")[this.target].querySelector("input, select, textarea");
 
@@ -203,7 +203,7 @@ HTMLIngredient.prototype.populateOptionChange = function(e) {
  * @param {event} e
  */
 HTMLIngredient.prototype.editableOptionChange = function(e) {
-    var select = e.target,
+    let select = e.target,
         input = select.nextSibling;
 
     input.value = select.childNodes[select.selectedIndex].value;

src/web/HTMLOperation.js

@@ -14,7 +14,7 @@ import HTMLIngredient from "./HTMLIngredient.js";
  * @param {App} app - The main view object for CyberChef.
  * @param {Manager} manager - The CyberChef event manager.
  */
-var HTMLOperation = function(name, config, app, manager) {
+const HTMLOperation = function(name, config, app, manager) {
     this.app         = app;
     this.manager     = manager;
 
@@ -24,8 +24,8 @@ var HTMLOperation = function(name, config, app, manager) {
     this.config      = config;
     this.ingList     = [];
 
-    for (var i = 0; i < config.args.length; i++) {
-        var ing = new HTMLIngredient(config.args[i], this.app, this.manager);
+    for (let i = 0; i < config.args.length; i++) {
+        const ing = new HTMLIngredient(config.args[i], this.app, this.manager);
         this.ingList.push(ing);
     }
 };
@@ -47,7 +47,7 @@ HTMLOperation.REMOVE_ICON = "iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAABwkl
  * @returns {string}
  */
 HTMLOperation.prototype.toStubHtml = function(removeIcon) {
-    var html = "<li class='operation'";
+    let html = "<li class='operation'";
 
     if (this.description) {
         html += " data-container='body' data-toggle='popover' data-placement='auto right'\
@@ -77,9 +77,9 @@ HTMLOperation.prototype.toStubHtml = function(removeIcon) {
  * @returns {string}
  */
 HTMLOperation.prototype.toFullHtml = function() {
-    var html = "<div class='arg-title'>" + this.name + "</div>";
+    let html = "<div class='arg-title'>" + this.name + "</div>";
 
-    for (var i = 0; i < this.ingList.length; i++) {
+    for (let i = 0; i < this.ingList.length; i++) {
         html += this.ingList[i].toHtml();
     }
 

src/web/HighlighterWaiter.js

@@ -11,7 +11,7 @@ import Utils from "../core/Utils.js";
  * @constructor
  * @param {App} app - The main view object for CyberChef.
  */
-var HighlighterWaiter = function(app) {
+const HighlighterWaiter = function(app) {
     this.app = app;
 
     this.mouseButtonDown = false;
@@ -41,11 +41,11 @@ HighlighterWaiter.OUTPUT = 1;
  * @returns {boolean}
  */
 HighlighterWaiter.prototype._isSelectionBackwards = function() {
-    var backwards = false,
+    let backwards = false,
         sel = window.getSelection();
 
     if (!sel.isCollapsed) {
-        var range = document.createRange();
+        const range = document.createRange();
         range.setStart(sel.anchorNode, sel.anchorOffset);
         range.setEnd(sel.focusNode, sel.focusOffset);
         backwards = range.collapsed;
@@ -64,7 +64,7 @@ HighlighterWaiter.prototype._isSelectionBackwards = function() {
  * @returns {number}
  */
 HighlighterWaiter.prototype._getOutputHtmlOffset = function(node, offset) {
-    var sel = window.getSelection(),
+    let sel = window.getSelection(),
         range = document.createRange();
 
     range.selectNodeContents(document.getElementById("output-html"));
@@ -85,7 +85,7 @@ HighlighterWaiter.prototype._getOutputHtmlOffset = function(node, offset) {
  * @returns {number} pos.end
  */
 HighlighterWaiter.prototype._getOutputHtmlSelectionOffsets = function() {
-    var sel = window.getSelection(),
+    let sel = window.getSelection(),
         range,
         start = 0,
         end = 0,
@@ -121,7 +121,7 @@ HighlighterWaiter.prototype._getOutputHtmlSelectionOffsets = function() {
  * @param {event} e
  */
 HighlighterWaiter.prototype.inputScroll = function(e) {
-    var el = e.target;
+    const el = e.target;
     document.getElementById("input-highlighter").scrollTop = el.scrollTop;
     document.getElementById("input-highlighter").scrollLeft = el.scrollLeft;
 };
@@ -134,7 +134,7 @@ HighlighterWaiter.prototype.inputScroll = function(e) {
  * @param {event} e
  */
 HighlighterWaiter.prototype.outputScroll = function(e) {
-    var el = e.target;
+    const el = e.target;
     document.getElementById("output-highlighter").scrollTop = el.scrollTop;
     document.getElementById("output-highlighter").scrollLeft = el.scrollLeft;
 };
@@ -151,7 +151,7 @@ HighlighterWaiter.prototype.inputMousedown = function(e) {
     this.mouseTarget = HighlighterWaiter.INPUT;
     this.removeHighlights();
 
-    var el = e.target,
+    let el = e.target,
         start = el.selectionStart,
         end = el.selectionEnd;
 
@@ -173,7 +173,7 @@ HighlighterWaiter.prototype.outputMousedown = function(e) {
     this.mouseTarget = HighlighterWaiter.OUTPUT;
     this.removeHighlights();
 
-    var el = e.target,
+    let el = e.target,
         start = el.selectionStart,
         end = el.selectionEnd;
 
@@ -194,7 +194,7 @@ HighlighterWaiter.prototype.outputHtmlMousedown = function(e) {
     this.mouseButtonDown = true;
     this.mouseTarget = HighlighterWaiter.OUTPUT;
 
-    var sel = this._getOutputHtmlSelectionOffsets();
+    const sel = this._getOutputHtmlSelectionOffsets();
     if (sel.start !== 0 || sel.end !== 0) {
         document.getElementById("output-selection-info").innerHTML = this.selectionInfo(sel.start, sel.end);
     }
@@ -244,7 +244,7 @@ HighlighterWaiter.prototype.inputMousemove = function(e) {
         this.mouseTarget !== HighlighterWaiter.INPUT)
         return;
 
-    var el = e.target,
+    let el = e.target,
         start = el.selectionStart,
         end = el.selectionEnd;
 
@@ -268,7 +268,7 @@ HighlighterWaiter.prototype.outputMousemove = function(e) {
         this.mouseTarget !== HighlighterWaiter.OUTPUT)
         return;
 
-    var el = e.target,
+    let el = e.target,
         start = el.selectionStart,
         end = el.selectionEnd;
 
@@ -292,7 +292,7 @@ HighlighterWaiter.prototype.outputHtmlMousemove = function(e) {
         this.mouseTarget !== HighlighterWaiter.OUTPUT)
         return;
 
-    var sel = this._getOutputHtmlSelectionOffsets();
+    const sel = this._getOutputHtmlSelectionOffsets();
     if (sel.start !== 0 || sel.end !== 0) {
         document.getElementById("output-selection-info").innerHTML = this.selectionInfo(sel.start, sel.end);
     }
@@ -308,9 +308,9 @@ HighlighterWaiter.prototype.outputHtmlMousemove = function(e) {
  * @returns {string}
  */
 HighlighterWaiter.prototype.selectionInfo = function(start, end) {
-    var width = end.toString().length;
+    let width = end.toString().length;
     width = width < 2 ? 2 : width;
-    var startStr = Utils.pad(start.toString(), width, " ").replace(/ /g, "&nbsp;"),
+    let startStr = Utils.pad(start.toString(), width, " ").replace(/ /g, "&nbsp;"),
         endStr   = Utils.pad(end.toString(), width, " ").replace(/ /g, "&nbsp;"),
         lenStr   = Utils.pad((end-start).toString(), width, " ").replace(/ /g, "&nbsp;");
 
@@ -339,16 +339,16 @@ HighlighterWaiter.prototype.removeHighlights = function() {
  * @returns {Object[]} highlights[].args
  */
 HighlighterWaiter.prototype.generateHighlightList = function() {
-    var recipeConfig = this.app.getRecipeConfig(),
+    let recipeConfig = this.app.getRecipeConfig(),
         highlights = [];
 
-    for (var i = 0; i < recipeConfig.length; i++) {
+    for (let i = 0; i < recipeConfig.length; i++) {
         if (recipeConfig[i].disabled) continue;
 
         // If any breakpoints are set, do not attempt to highlight
         if (recipeConfig[i].breakpoint) return false;
 
-        var op = this.app.operations[recipeConfig[i].op];
+        const op = this.app.operations[recipeConfig[i].op];
 
         // If any of the operations do not support highlighting, fail immediately.
         if (op.highlight === false || op.highlight === undefined) return false;
@@ -376,13 +376,13 @@ HighlighterWaiter.prototype.generateHighlightList = function() {
  * @param {number} pos.end - The end offset.
  */
 HighlighterWaiter.prototype.highlightOutput = function(pos) {
-    var highlights = this.generateHighlightList();
+    const highlights = this.generateHighlightList();
 
     if (!highlights || !this.app.autoBake_) {
         return false;
     }
 
-    for (var i = 0; i < highlights.length; i++) {
+    for (let i = 0; i < highlights.length; i++) {
         // Remove multiple highlights before processing again
         pos = [pos[0]];
 
@@ -411,13 +411,13 @@ HighlighterWaiter.prototype.highlightOutput = function(pos) {
  * @param {number} pos.end - The end offset.
  */
 HighlighterWaiter.prototype.highlightInput = function(pos) {
-    var highlights = this.generateHighlightList();
+    const highlights = this.generateHighlightList();
 
     if (!highlights || !this.app.autoBake_) {
         return false;
     }
 
-    for (var i = 0; i < highlights.length; i++) {
+    for (let i = 0; i < highlights.length; i++) {
         // Remove multiple highlights before processing again
         pos = [pos[0]];
 
@@ -452,7 +452,7 @@ HighlighterWaiter.prototype.highlight = function(textarea, highlighter, pos) {
     // be displayed by the HTML textarea and will mess up highlighting offsets.
     if (!this.app.dishStr || this.app.dishStr.indexOf("\r") >= 0) return false;
 
-    var startPlaceholder = "[startHighlight]",
+    let startPlaceholder = "[startHighlight]",
         startPlaceholderRegex = /\[startHighlight\]/g,
         endPlaceholder = "[endHighlight]",
         endPlaceholderRegex = /\[endHighlight\]/g,
@@ -468,11 +468,11 @@ HighlighterWaiter.prototype.highlight = function(textarea, highlighter, pos) {
             text.slice(pos[0].end, text.length);
     } else {
         // O(n^2) - Can anyone improve this without overwriting placeholders?
-        var result = "",
+        let result = "",
             endPlaced = true;
 
-        for (var i = 0; i < text.length; i++) {
-            for (var j = 1; j < pos.length; j++) {
+        for (let i = 0; i < text.length; i++) {
+            for (let j = 1; j < pos.length; j++) {
                 if (pos[j].end < pos[j].start) continue;
                 if (pos[j].start === i) {
                     result += startPlaceholder;
@@ -489,7 +489,7 @@ HighlighterWaiter.prototype.highlight = function(textarea, highlighter, pos) {
         text = result;
     }
 
-    var cssClass = "hl1";
+    const cssClass = "hl1";
     //if (colour) cssClass += "-"+colour;
 
     // Remove HTML tags

src/web/InputWaiter.js

@@ -12,7 +12,7 @@ import Utils from "../core/Utils.js";
  * @param {App} app - The main view object for CyberChef.
  * @param {Manager} manager - The CyberChef event manager.
  */
-var InputWaiter = function(app, manager) {
+const InputWaiter = function(app, manager) {
     this.app = app;
     this.manager = manager;
 
@@ -66,11 +66,11 @@ InputWaiter.prototype.set = function(input) {
  * @param {number} lines - The number of the lines in the current input string
  */
 InputWaiter.prototype.setInputInfo = function(length, lines) {
-    var width = length.toString().length;
+    let width = length.toString().length;
     width = width < 2 ? 2 : width;
 
-    var lengthStr = Utils.pad(length.toString(), width, " ").replace(/ /g, "&nbsp;");
-    var linesStr  = Utils.pad(lines.toString(), width, " ").replace(/ /g, "&nbsp;");
+    const lengthStr = Utils.pad(length.toString(), width, " ").replace(/ /g, "&nbsp;");
+    const linesStr  = Utils.pad(lines.toString(), width, " ").replace(/ /g, "&nbsp;");
 
     document.getElementById("input-info").innerHTML = "length: " + lengthStr + "<br>lines: " + linesStr;
 };
@@ -92,7 +92,7 @@ InputWaiter.prototype.inputChange = function(e) {
     this.app.progress = 0;
 
     // Update the input metadata info
-    var inputText = this.get(),
+    let inputText = this.get(),
         lines = inputText.count("\n") + 1;
 
     this.setInputInfo(inputText.length, lines);
@@ -149,7 +149,7 @@ InputWaiter.prototype.inputDrop = function(e) {
     e.stopPropagation();
     e.preventDefault();
 
-    var el = e.target,
+    let el = e.target,
         file = e.dataTransfer.files[0],
         text = e.dataTransfer.getData("Text"),
         reader = new FileReader(),
@@ -157,14 +157,14 @@ InputWaiter.prototype.inputDrop = function(e) {
         offset = 0,
         CHUNK_SIZE = 20480; // 20KB
 
-    var setInput = function() {
+    const setInput = function() {
         if (inputCharcode.length > 100000 && this.app.autoBake_) {
             this.manager.controls.setAutoBake(false);
             this.app.alert("Turned off Auto Bake as the input is large", "warning", 5000);
         }
 
         this.set(inputCharcode);
-        var recipeConfig = this.app.getRecipeConfig();
+        const recipeConfig = this.app.getRecipeConfig();
         if (!recipeConfig[0] || recipeConfig[0].op !== "From Hex") {
             recipeConfig.unshift({op:"From Hex", args:["Space"]});
             this.app.setRecipeConfig(recipeConfig);
@@ -173,18 +173,18 @@ InputWaiter.prototype.inputDrop = function(e) {
         el.classList.remove("loadingFile");
     }.bind(this);
 
-    var seek = function() {
+    const seek = function() {
         if (offset >= file.size) {
             setInput();
             return;
         }
         el.value = "Processing... " + Math.round(offset / file.size * 100) + "%";
-        var slice = file.slice(offset, offset + CHUNK_SIZE);
+        const slice = file.slice(offset, offset + CHUNK_SIZE);
         reader.readAsArrayBuffer(slice);
     };
 
     reader.onload = function(e) {
-        var data = new Uint8Array(reader.result);
+        const data = new Uint8Array(reader.result);
         inputCharcode += Utils.toHexFast(data);
         offset += CHUNK_SIZE;
         seek();

src/web/Manager.js

@@ -19,7 +19,7 @@ import SeasonalWaiter from "./SeasonalWaiter.js";
  * @constructor
  * @param {App} app - The main view object for CyberChef.
  */
-var Manager = function(app) {
+const Manager = function(app) {
     this.app = app;
 
     // Define custom events
@@ -195,8 +195,8 @@ Manager.prototype.addListeners = function(selector, eventType, callback, scope)
  * this.addMultiEventListener("search", "keyup paste search", this.search, this);
  */
 Manager.prototype.addMultiEventListener = function(selector, eventTypes, callback, scope) {
-    var evs = eventTypes.split(" ");
-    for (var i = 0; i < evs.length; i++) {
+    const evs = eventTypes.split(" ");
+    for (let i = 0; i < evs.length; i++) {
         document.querySelector(selector).addEventListener(evs[i], callback.bind(scope));
     }
 };
@@ -216,8 +216,8 @@ Manager.prototype.addMultiEventListener = function(selector, eventTypes, callbac
  * this.addMultiEventListener(".saveable", "keyup paste", this.save, this);
  */
 Manager.prototype.addMultiEventListeners = function(selector, eventTypes, callback, scope) {
-    var evs = eventTypes.split(" ");
-    for (var i = 0; i < evs.length; i++) {
+    const evs = eventTypes.split(" ");
+    for (let i = 0; i < evs.length; i++) {
         this.addListeners(selector, evs[i], callback, scope);
     }
 };
@@ -238,7 +238,7 @@ Manager.prototype.addMultiEventListeners = function(selector, eventTypes, callba
  * this.addDynamicListener("button", "click", alert, this);
  */
 Manager.prototype.addDynamicListener = function(selector, eventType, callback, scope) {
-    var eventConfig = {
+    const eventConfig = {
         selector: selector,
         callback: callback.bind(scope || this)
     };
@@ -261,14 +261,14 @@ Manager.prototype.addDynamicListener = function(selector, eventType, callback, s
  * @param {Event} e - The event to be handled
  */
 Manager.prototype.dynamicListenerHandler = function(e) {
-    var handlers = this.dynamicHandlers[e.type],
+    let handlers = this.dynamicHandlers[e.type],
         matches = e.target.matches ||
             e.target.webkitMatchesSelector ||
             e.target.mozMatchesSelector ||
             e.target.msMatchesSelector ||
             e.target.oMatchesSelector;
 
-    for (var i = 0; i < handlers.length; i++) {
+    for (let i = 0; i < handlers.length; i++) {
         if (matches && e.target[matches.name](handlers[i].selector)) {
             handlers[i].callback(e);
         }

src/web/OperationsWaiter.js

@@ -13,7 +13,7 @@ import Sortable from "sortablejs";
  * @param {App} app - The main view object for CyberChef.
  * @param {Manager} manager - The CyberChef event manager.
  */
-var OperationsWaiter = function(app, manager) {
+const OperationsWaiter = function(app, manager) {
     this.app = app;
     this.manager = manager;
 
@@ -29,7 +29,7 @@ var OperationsWaiter = function(app, manager) {
  * @param {event} e
  */
 OperationsWaiter.prototype.searchOperations = function(e) {
-    var ops, selected;
+    let ops, selected;
 
     if (e.type === "search") { // Search
         e.preventDefault();
@@ -68,7 +68,7 @@ OperationsWaiter.prototype.searchOperations = function(e) {
             ops[selected-1].classList.add("selected-op");
         }
     } else {
-        var searchResultsEl = document.getElementById("search-results"),
+        let searchResultsEl = document.getElementById("search-results"),
             el = e.target,
             str = el.value;
 
@@ -81,10 +81,10 @@ OperationsWaiter.prototype.searchOperations = function(e) {
 
         $("#categories .in").collapse("hide");
         if (str) {
-            var matchedOps = this.filterOperations(str, true),
+            let matchedOps = this.filterOperations(str, true),
                 matchedOpsHtml = "";
 
-            for (var i = 0; i < matchedOps.length; i++) {
+            for (let i = 0; i < matchedOps.length; i++) {
                 matchedOpsHtml += matchedOps[i].toStubHtml();
             }
 
@@ -104,18 +104,18 @@ OperationsWaiter.prototype.searchOperations = function(e) {
  * @returns {string[]}
  */
 OperationsWaiter.prototype.filterOperations = function(searchStr, highlight) {
-    var matchedOps = [],
+    let matchedOps = [],
         matchedDescs = [];
 
     searchStr = searchStr.toLowerCase();
 
-    for (var opName in this.app.operations) {
-        var op = this.app.operations[opName],
+    for (const opName in this.app.operations) {
+        let op = this.app.operations[opName],
             namePos = opName.toLowerCase().indexOf(searchStr),
             descPos = op.description.toLowerCase().indexOf(searchStr);
 
         if (namePos >= 0 || descPos >= 0) {
-            var operation = new HTMLOperation(opName, this.app.operations[opName], this.app, this.manager);
+            const operation = new HTMLOperation(opName, this.app.operations[opName], this.app, this.manager);
             if (highlight) {
                 operation.highlightSearchString(searchStr, namePos, descPos);
             }
@@ -140,7 +140,7 @@ OperationsWaiter.prototype.filterOperations = function(searchStr, highlight) {
  * @returns {number}
  */
 OperationsWaiter.prototype.getSelectedOp = function(ops) {
-    for (var i = 0; i < ops.length; i++) {
+    for (let i = 0; i < ops.length; i++) {
         if (ops[i].classList.contains("selected-op")) {
             return i;
         }
@@ -168,7 +168,7 @@ OperationsWaiter.prototype.opListCreate = function(e) {
  * @param {event} e
  */
 OperationsWaiter.prototype.operationDblclick = function(e) {
-    var li = e.target;
+    const li = e.target;
 
     this.manager.recipe.addOperation(li.textContent);
     this.app.autoBake();
@@ -186,25 +186,25 @@ OperationsWaiter.prototype.editFavouritesClick = function(e) {
     e.stopPropagation();
 
     // Add favourites to modal
-    var favCat = this.app.categories.filter(function(c) {
+    const favCat = this.app.categories.filter(function(c) {
         return c.name === "Favourites";
     })[0];
 
-    var html = "";
-    for (var i = 0; i < favCat.ops.length; i++) {
-        var opName = favCat.ops[i];
-        var operation = new HTMLOperation(opName, this.app.operations[opName], this.app, this.manager);
+    let html = "";
+    for (let i = 0; i < favCat.ops.length; i++) {
+        const opName = favCat.ops[i];
+        const operation = new HTMLOperation(opName, this.app.operations[opName], this.app, this.manager);
         html += operation.toStubHtml(true);
     }
 
-    var editFavouritesList = document.getElementById("edit-favourites-list");
+    const editFavouritesList = document.getElementById("edit-favourites-list");
     editFavouritesList.innerHTML = html;
     this.removeIntent = false;
 
-    var editableList = Sortable.create(editFavouritesList, {
+    const editableList = Sortable.create(editFavouritesList, {
         filter: ".remove-icon",
         onFilter: function (evt) {
-            var el = editableList.closest(evt.item);
+            const el = editableList.closest(evt.item);
             if (el) {
                 $(el).popover("destroy");
                 el.parentNode.removeChild(el);
@@ -236,10 +236,10 @@ OperationsWaiter.prototype.editFavouritesClick = function(e) {
  * Saves the selected favourites and reloads them.
  */
 OperationsWaiter.prototype.saveFavouritesClick = function() {
-    var favouritesList = [],
+    let favouritesList = [],
         favs = document.querySelectorAll("#edit-favourites-list li");
 
-    for (var i = 0; i < favs.length; i++) {
+    for (let i = 0; i < favs.length; i++) {
         favouritesList.push(favs[i].textContent);
     }
 
@@ -266,7 +266,7 @@ OperationsWaiter.prototype.resetFavouritesClick = function() {
  * @param {event} e
  */
 OperationsWaiter.prototype.opIconMouseover = function(e) {
-    var opEl = e.target.parentNode;
+    const opEl = e.target.parentNode;
     if (e.target.getAttribute("data-toggle") === "popover") {
         $(opEl).popover("hide");
     }
@@ -281,7 +281,7 @@ OperationsWaiter.prototype.opIconMouseover = function(e) {
  * @param {event} e
  */
 OperationsWaiter.prototype.opIconMouseleave = function(e) {
-    var opEl = e.target.parentNode,
+    let opEl = e.target.parentNode,
         toEl = e.toElement || e.relatedElement;
 
     if (e.target.getAttribute("data-toggle") === "popover" && toEl === opEl) {

src/web/OptionsWaiter.js

@@ -8,7 +8,7 @@
  * @constructor
  * @param {App} app - The main view object for CyberChef.
  */
-var OptionsWaiter = function(app) {
+const OptionsWaiter = function(app) {
     this.app = app;
 };
 
@@ -24,23 +24,24 @@ OptionsWaiter.prototype.load = function(options) {
         animate: false,
     });
 
-    for (var option in options) {
+    for (const option in options) {
         this.app.options[option] = options[option];
     }
 
     // Set options to match object
-    var cboxes = document.querySelectorAll("#options-body input[type=checkbox]");
-    for (var i = 0; i < cboxes.length; i++) {
+    const cboxes = document.querySelectorAll("#options-body input[type=checkbox]");
+    let i;
+    for (i = 0; i < cboxes.length; i++) {
         $(cboxes[i]).bootstrapSwitch("state", this.app.options[cboxes[i].getAttribute("option")]);
     }
 
-    var nboxes = document.querySelectorAll("#options-body input[type=number]");
+    const nboxes = document.querySelectorAll("#options-body input[type=number]");
     for (i = 0; i < nboxes.length; i++) {
         nboxes[i].value = this.app.options[nboxes[i].getAttribute("option")];
         nboxes[i].dispatchEvent(new CustomEvent("change", {bubbles: true}));
     }
 
-    var selects = document.querySelectorAll("#options-body select");
+    const selects = document.querySelectorAll("#options-body select");
     for (i = 0; i < selects.length; i++) {
         selects[i].value = this.app.options[selects[i].getAttribute("option")];
         selects[i].dispatchEvent(new CustomEvent("change", {bubbles: true}));
@@ -74,7 +75,7 @@ OptionsWaiter.prototype.resetOptionsClick = function() {
  * @param {boolean} state
  */
 OptionsWaiter.prototype.switchChange = function(e, state) {
-    var el = e.target,
+    let el = e.target,
         option = el.getAttribute("option");
 
     this.app.options[option] = state;
@@ -89,7 +90,7 @@ OptionsWaiter.prototype.switchChange = function(e, state) {
  * @param {event} e
  */
 OptionsWaiter.prototype.numberChange = function(e) {
-    var el = e.target,
+    let el = e.target,
         option = el.getAttribute("option");
 
     this.app.options[option] = parseInt(el.value, 10);
@@ -104,7 +105,7 @@ OptionsWaiter.prototype.numberChange = function(e) {
  * @param {event} e
  */
 OptionsWaiter.prototype.selectChange = function(e) {
-    var el = e.target,
+    let el = e.target,
         option = el.getAttribute("option");
 
     this.app.options[option] = el.value;

src/web/OutputWaiter.js

@@ -12,7 +12,7 @@ import Utils from "../core/Utils.js";
  * @param {App} app - The main view object for CyberChef.
  * @param {Manager} manager - The CyberChef event manager.
  */
-var OutputWaiter = function(app, manager) {
+const OutputWaiter = function(app, manager) {
     this.app = app;
     this.manager = manager;
 };
@@ -36,7 +36,7 @@ OutputWaiter.prototype.get = function() {
  * @param {number} duration - The length of time (ms) it took to generate the output
  */
 OutputWaiter.prototype.set = function(dataStr, type, duration) {
-    var outputText = document.getElementById("output-text"),
+    let outputText = document.getElementById("output-text"),
         outputHtml = document.getElementById("output-html"),
         outputHighlighter = document.getElementById("output-highlighter"),
         inputHighlighter = document.getElementById("input-highlighter");
@@ -51,8 +51,8 @@ OutputWaiter.prototype.set = function(dataStr, type, duration) {
         outputHtml.innerHTML = dataStr;
 
         // Execute script sections
-        var scriptElements = outputHtml.querySelectorAll("script");
-        for (var i = 0; i < scriptElements.length; i++) {
+        const scriptElements = outputHtml.querySelectorAll("script");
+        for (let i = 0; i < scriptElements.length; i++) {
             try {
                 eval(scriptElements[i].innerHTML); // eslint-disable-line no-eval
             } catch (err) {
@@ -70,7 +70,7 @@ OutputWaiter.prototype.set = function(dataStr, type, duration) {
     }
 
     this.manager.highlighter.removeHighlights();
-    var lines = dataStr.count("\n") + 1;
+    const lines = dataStr.count("\n") + 1;
     this.setOutputInfo(dataStr.length, lines, duration);
 };
 
@@ -83,12 +83,12 @@ OutputWaiter.prototype.set = function(dataStr, type, duration) {
  * @param {number} duration - The length of time (ms) it took to generate the output
  */
 OutputWaiter.prototype.setOutputInfo = function(length, lines, duration) {
-    var width = length.toString().length;
+    let width = length.toString().length;
     width = width < 4 ? 4 : width;
 
-    var lengthStr = Utils.pad(length.toString(), width, " ").replace(/ /g, "&nbsp;");
-    var linesStr  = Utils.pad(lines.toString(), width, " ").replace(/ /g, "&nbsp;");
-    var timeStr   = Utils.pad(duration.toString() + "ms", width, " ").replace(/ /g, "&nbsp;");
+    const lengthStr = Utils.pad(length.toString(), width, " ").replace(/ /g, "&nbsp;");
+    const linesStr  = Utils.pad(lines.toString(), width, " ").replace(/ /g, "&nbsp;");
+    const timeStr   = Utils.pad(duration.toString() + "ms", width, " ").replace(/ /g, "&nbsp;");
 
     document.getElementById("output-info").innerHTML = "time: " + timeStr +
         "<br>length: " + lengthStr +
@@ -103,7 +103,7 @@ OutputWaiter.prototype.setOutputInfo = function(length, lines, duration) {
  * without wrapping or overflowing.
  */
 OutputWaiter.prototype.adjustWidth = function() {
-    var output         = document.getElementById("output"),
+    let output         = document.getElementById("output"),
         saveToFile     = document.getElementById("save-to-file"),
         switchIO       = document.getElementById("switch"),
         undoSwitch     = document.getElementById("undo-switch"),
@@ -129,11 +129,11 @@ OutputWaiter.prototype.adjustWidth = function() {
  * Saves the current output to a file, downloaded as a URL octet stream.
  */
 OutputWaiter.prototype.saveClick = function() {
-    var data = Utils.toBase64(this.app.dishStr),
+    let data = Utils.toBase64(this.app.dishStr),
         filename = window.prompt("Please enter a filename:", "download.dat");
 
     if (filename) {
-        var el = document.createElement("a");
+        const el = document.createElement("a");
         el.setAttribute("href", "data:application/octet-stream;base64;charset=utf-8," + data);
         el.setAttribute("download", filename);
 
@@ -173,7 +173,7 @@ OutputWaiter.prototype.undoSwitchClick = function() {
  * Resizes the output frame to be as large as possible, or restores it to its original size.
  */
 OutputWaiter.prototype.maximiseOutputClick = function(e) {
-    var el = e.target.id === "maximise-output" ? e.target : e.target.parentNode;
+    const el = e.target.id === "maximise-output" ? e.target : e.target.parentNode;
 
     if (el.getAttribute("title") === "Maximise") {
         this.app.columnSplitter.collapse(0);

src/web/RecipeWaiter.js

@@ -13,7 +13,7 @@ import Sortable from "sortablejs";
  * @param {App} app - The main view object for CyberChef.
  * @param {Manager} manager - The CyberChef event manager.
  */
-var RecipeWaiter = function(app, manager) {
+const RecipeWaiter = function(app, manager) {
     this.app = app;
     this.manager = manager;
     this.removeIntent = false;
@@ -24,7 +24,7 @@ var RecipeWaiter = function(app, manager) {
  * Sets up the drag and drop capability for operations in the operations and recipe areas.
  */
 RecipeWaiter.prototype.initialiseOperationDragNDrop = function() {
-    var recList = document.getElementById("rec-list");
+    const recList = document.getElementById("rec-list");
 
     // Recipe list
     Sortable.create(recList, {
@@ -60,7 +60,7 @@ RecipeWaiter.prototype.initialiseOperationDragNDrop = function() {
     }.bind(this));
 
     Sortable.utils.on(recList, "touchend", function(e) {
-        var loc = e.changedTouches[0],
+        let loc = e.changedTouches[0],
             target = document.elementFromPoint(loc.clientX, loc.clientY);
 
         this.removeIntent = !recList.contains(target);
@@ -182,7 +182,7 @@ RecipeWaiter.prototype.favDrop = function(e) {
     e.preventDefault();
     e.target.classList.remove("favourites-hover");
 
-    var opName = e.dataTransfer.getData("Text");
+    const opName = e.dataTransfer.getData("Text");
     this.app.addFavourite(opName);
 };
 
@@ -205,7 +205,7 @@ RecipeWaiter.prototype.ingChange = function() {
  * @param {event} e
  */
 RecipeWaiter.prototype.disableClick = function(e) {
-    var icon = e.target;
+    const icon = e.target;
 
     if (icon.getAttribute("disabled") === "false") {
         icon.setAttribute("disabled", "true");
@@ -230,7 +230,7 @@ RecipeWaiter.prototype.disableClick = function(e) {
  * @param {event} e
  */
 RecipeWaiter.prototype.breakpointClick = function(e) {
-    var bp = e.target;
+    const bp = e.target;
 
     if (bp.getAttribute("break") === "false") {
         bp.setAttribute("break", "true");
@@ -276,16 +276,16 @@ RecipeWaiter.prototype.operationChildDblclick = function(e) {
  * @returns {recipeConfig}
  */
 RecipeWaiter.prototype.getConfig = function() {
-    var config = [], ingredients, ingList, disabled, bp, item,
+    let config = [], ingredients, ingList, disabled, bp, item,
         operations = document.querySelectorAll("#rec-list li.operation");
 
-    for (var i = 0; i < operations.length; i++) {
+    for (let i = 0; i < operations.length; i++) {
         ingredients = [];
         disabled = operations[i].querySelector(".disable-icon");
         bp = operations[i].querySelector(".breakpoint");
         ingList = operations[i].querySelectorAll(".arg");
 
-        for (var j = 0; j < ingList.length; j++) {
+        for (let j = 0; j < ingList.length; j++) {
             if (ingList[j].getAttribute("type") === "checkbox") {
                 // checkbox
                 ingredients[j] = ingList[j].checked;
@@ -327,8 +327,8 @@ RecipeWaiter.prototype.getConfig = function() {
  * @param {number} position
  */
 RecipeWaiter.prototype.updateBreakpointIndicator = function(position) {
-    var operations = document.querySelectorAll("#rec-list li.operation");
-    for (var i = 0; i < operations.length; i++) {
+    const operations = document.querySelectorAll("#rec-list li.operation");
+    for (let i = 0; i < operations.length; i++) {
         if (i === position) {
             operations[i].classList.add("break");
         } else {
@@ -345,8 +345,8 @@ RecipeWaiter.prototype.updateBreakpointIndicator = function(position) {
  * @param {element} el - The operation stub element from the operations pane
  */
 RecipeWaiter.prototype.buildRecipeOperation = function(el) {
-    var opName = el.textContent;
-    var op = new HTMLOperation(opName, this.app.operations[opName], this.app, this.manager);
+    const opName = el.textContent;
+    const op = new HTMLOperation(opName, this.app.operations[opName], this.app, this.manager);
     el.innerHTML = op.toFullHtml();
 
     if (this.app.operations[opName].flowControl) {
@@ -369,7 +369,7 @@ RecipeWaiter.prototype.buildRecipeOperation = function(el) {
  * @returns {element}
  */
 RecipeWaiter.prototype.addOperation = function(name) {
-    var item = document.createElement("li");
+    const item = document.createElement("li");
 
     item.classList.add("operation");
     item.innerHTML = name;
@@ -387,7 +387,7 @@ RecipeWaiter.prototype.addOperation = function(name) {
  * @fires Manager#operationremove
  */
 RecipeWaiter.prototype.clearRecipe = function() {
-    var recList = document.getElementById("rec-list");
+    const recList = document.getElementById("rec-list");
     while (recList.firstChild) {
         recList.removeChild(recList.firstChild);
     }
@@ -402,7 +402,7 @@ RecipeWaiter.prototype.clearRecipe = function() {
  * @param {event} e
  */
 RecipeWaiter.prototype.dropdownToggleClick = function(e) {
-    var el = e.target,
+    let el = e.target,
         button = el.parentNode.parentNode.previousSibling;
 
     button.innerHTML = el.textContent + " <span class='caret'></span>";

src/web/WindowWaiter.js

@@ -8,7 +8,7 @@
  * @constructor
  * @param {App} app - The main view object for CyberChef.
  */
-var WindowWaiter = function(app) {
+const WindowWaiter = function(app) {
     this.app = app;
 };
 
@@ -45,7 +45,7 @@ WindowWaiter.prototype.windowBlur = function() {
  * a long time and the browser has swapped out all its memory.
  */
 WindowWaiter.prototype.windowFocus = function() {
-    var unfocusedTime = new Date().getTime() - this.windowBlurTime;
+    const unfocusedTime = new Date().getTime() - this.windowBlurTime;
     if (unfocusedTime > 60000) {
         this.app.silentBake();
     }

src/web/index.js

@@ -23,8 +23,8 @@ import OperationConfig from "../core/config/OperationConfig.js";
 /**
  * Main function used to build the CyberChef web app.
  */
-var main = function() {
-    var defaultFavourites = [
+function main() {
+    const defaultFavourites = [
         "To Base64",
         "From Base64",
         "To Hex",
@@ -37,7 +37,7 @@ var main = function() {
         "Fork"
     ];
 
-    var defaultOptions = {
+    const defaultOptions = {
         updateUrl         : true,
         showHighlighter   : true,
         treatAsUtf8       : true,
@@ -51,7 +51,7 @@ var main = function() {
     document.removeEventListener("DOMContentLoaded", main, false);
     window.app = new App(Categories, OperationConfig, defaultFavourites, defaultOptions);
     window.app.setup();
-};
+}
 
 // Fix issues with browsers that don't support console.log()
 window.console = console || {log: function() {}, error: function() {}};

test/TestRegister.js

@@ -38,7 +38,7 @@ import Chef from "../src/core/Chef.js";
     TestRegister.prototype.runTests = function() {
         return Promise.all(
             this.tests.map(function(test, i) {
-                var chef = new Chef();
+                let chef = new Chef();
 
                 return Promise.resolve(chef.bake(
                     test.input,
@@ -48,7 +48,7 @@ import Chef from "../src/core/Chef.js";
                     false
                 ))
                 .then(function(result) {
-                    var ret = {
+                    let ret = {
                         test: test,
                         status: null,
                         output: null,

test/index.js

@@ -19,7 +19,7 @@ import "./tests/operations/FlowControl.js";
 import "./tests/operations/MorseCode.js";
 import "./tests/operations/StrUtils.js";
 
-var allTestsPassing = true,
+let allTestsPassing = true,
     testStatusCounts = {
         total: 0,
     };
@@ -32,7 +32,7 @@ var allTestsPassing = true,
  * @returns {string}
  */
 function statusToIcon(status) {
-    var icons = {
+    let icons = {
         erroring: "🔥",
         failing: "❌",
         passing: "✔️️",
@@ -48,7 +48,7 @@ function statusToIcon(status) {
  */
 function handleTestResult(testResult) {
     allTestsPassing = allTestsPassing && testResult.status === "passing";
-    var newCount = (testStatusCounts[testResult.status] || 0) + 1;
+    let newCount = (testStatusCounts[testResult.status] || 0) + 1;
     testStatusCounts[testResult.status] = newCount;
     testStatusCounts.total += 1;
 
@@ -83,8 +83,8 @@ TestRegister.runTests()
 
         console.log("\n");
 
-        for (var testStatus in testStatusCounts) {
-            var count = testStatusCounts[testStatus];
+        for (let testStatus in testStatusCounts) {
+            let count = testStatusCounts[testStatus];
             if (count > 0) {
                 console.log(testStatus.toUpperCase(), count);
             }