diff --git a/Libraries/LibJS/Forward.h b/Libraries/LibJS/Forward.h
index 34ec9d2952a..42756076043 100644
--- a/Libraries/LibJS/Forward.h
+++ b/Libraries/LibJS/Forward.h
@@ -73,13 +73,15 @@
     __JS_ENUMERATE(TypeError, type_error, TypeErrorPrototype, TypeErrorConstructor, void)                                                  \
     __JS_ENUMERATE(URIError, uri_error, URIErrorPrototype, URIErrorConstructor, void)
 
-#define JS_ENUMERATE_TYPED_ARRAYS                                                                \
-    __JS_ENUMERATE(Uint8Array, uint8_array, Uint8ArrayPrototype, Uint8ArrayConstructor, u8)      \
-    __JS_ENUMERATE(Uint16Array, uint16_array, Uint16ArrayPrototype, Uint16ArrayConstructor, u16) \
-    __JS_ENUMERATE(Uint32Array, uint32_array, Uint32ArrayPrototype, Uint32ArrayConstructor, u32) \
-    __JS_ENUMERATE(Int8Array, int8_array, Int8ArrayPrototype, Int8ArrayConstructor, i8)          \
-    __JS_ENUMERATE(Int16Array, int16_array, Int16ArrayPrototype, Int16ArrayConstructor, i16)     \
-    __JS_ENUMERATE(Int32Array, int32_array, Int32ArrayPrototype, Int32ArrayConstructor, i32)
+#define JS_ENUMERATE_TYPED_ARRAYS                                                                      \
+    __JS_ENUMERATE(Uint8Array, uint8_array, Uint8ArrayPrototype, Uint8ArrayConstructor, u8)            \
+    __JS_ENUMERATE(Uint16Array, uint16_array, Uint16ArrayPrototype, Uint16ArrayConstructor, u16)       \
+    __JS_ENUMERATE(Uint32Array, uint32_array, Uint32ArrayPrototype, Uint32ArrayConstructor, u32)       \
+    __JS_ENUMERATE(Int8Array, int8_array, Int8ArrayPrototype, Int8ArrayConstructor, i8)                \
+    __JS_ENUMERATE(Int16Array, int16_array, Int16ArrayPrototype, Int16ArrayConstructor, i16)           \
+    __JS_ENUMERATE(Int32Array, int32_array, Int32ArrayPrototype, Int32ArrayConstructor, i32)           \
+    __JS_ENUMERATE(Float32Array, float32_array, Float32ArrayPrototype, Float32ArrayConstructor, float) \
+    __JS_ENUMERATE(Float64Array, float64_array, Float64ArrayPrototype, Float64ArrayConstructor, double)
 
 #define JS_ENUMERATE_ITERATOR_PROTOTYPES          \
     __JS_ENUMERATE(Iterator, iterator)            \
diff --git a/Libraries/LibJS/Runtime/TypedArray.h b/Libraries/LibJS/Runtime/TypedArray.h
index fccf72b4c23..1a10a1a93f3 100644
--- a/Libraries/LibJS/Runtime/TypedArray.h
+++ b/Libraries/LibJS/Runtime/TypedArray.h
@@ -80,7 +80,7 @@ public:
             if (vm().exception())
                 return {};
             data()[property_index] = number;
-        } else if constexpr (sizeof(T) == 4) {
+        } else if constexpr (sizeof(T) == 4 || sizeof(T) == 8) {
             auto number = value.to_double(global_object());
             if (vm().exception())
                 return {};
@@ -99,9 +99,11 @@ public:
 
         if constexpr (sizeof(T) < 4) {
             return Value((i32)data()[property_index]);
-        } else if constexpr (sizeof(T) == 4) {
+        } else if constexpr (sizeof(T) == 4 || sizeof(T) == 8) {
             auto value = data()[property_index];
-            if constexpr (NumericLimits<T>::is_signed()) {
+            if constexpr (IsFloatingPoint<T>::value) {
+                return Value((double)value);
+            } else if constexpr (NumericLimits<T>::is_signed()) {
                 if (value > NumericLimits<i32>::max() || value < NumericLimits<i32>::min())
                     return Value((double)value);
             } else {
diff --git a/Libraries/LibJS/Tests/builtins/ArrayBuffer/ArrayBuffer.isView.js b/Libraries/LibJS/Tests/builtins/ArrayBuffer/ArrayBuffer.isView.js
index c7056b88b28..db1be84067e 100644
--- a/Libraries/LibJS/Tests/builtins/ArrayBuffer/ArrayBuffer.isView.js
+++ b/Libraries/LibJS/Tests/builtins/ArrayBuffer/ArrayBuffer.isView.js
@@ -1,5 +1,14 @@
 // Update when more typed arrays get added
-const TYPED_ARRAYS = [Uint8Array, Uint16Array, Uint32Array, Int8Array, Int16Array, Int32Array];
+const TYPED_ARRAYS = [
+    Uint8Array,
+    Uint16Array,
+    Uint32Array,
+    Int8Array,
+    Int16Array,
+    Int32Array,
+    Float32Array,
+    Float64Array,
+];
 
 test("basic functionality", () => {
     expect(ArrayBuffer.isView).toHaveLength(1);
diff --git a/Libraries/LibJS/Tests/builtins/TypedArray/TypedArray.BYTES_PER_ELEMENT.js b/Libraries/LibJS/Tests/builtins/TypedArray/TypedArray.BYTES_PER_ELEMENT.js
index 82c207e5dc3..c53213ac070 100644
--- a/Libraries/LibJS/Tests/builtins/TypedArray/TypedArray.BYTES_PER_ELEMENT.js
+++ b/Libraries/LibJS/Tests/builtins/TypedArray/TypedArray.BYTES_PER_ELEMENT.js
@@ -5,4 +5,6 @@ test("basic functionality", () => {
     expect(Int8Array.BYTES_PER_ELEMENT).toBe(1);
     expect(Int16Array.BYTES_PER_ELEMENT).toBe(2);
     expect(Int32Array.BYTES_PER_ELEMENT).toBe(4);
+    expect(Float32Array.BYTES_PER_ELEMENT).toBe(4);
+    expect(Float64Array.BYTES_PER_ELEMENT).toBe(8);
 });
diff --git a/Libraries/LibJS/Tests/builtins/TypedArray/TypedArray.js b/Libraries/LibJS/Tests/builtins/TypedArray/TypedArray.js
index 09884a6f81a..d443d13cd66 100644
--- a/Libraries/LibJS/Tests/builtins/TypedArray/TypedArray.js
+++ b/Libraries/LibJS/Tests/builtins/TypedArray/TypedArray.js
@@ -1,5 +1,14 @@
 // Update when more typed arrays get added
-const TYPED_ARRAYS = [Uint8Array, Uint16Array, Uint32Array, Int8Array, Int16Array, Int32Array];
+const TYPED_ARRAYS = [
+    Uint8Array,
+    Uint16Array,
+    Uint32Array,
+    Int8Array,
+    Int16Array,
+    Int32Array,
+    Float32Array,
+    Float64Array,
+];
 
 const getTypedArrayConstructor = () => Object.getPrototypeOf(TYPED_ARRAYS[0]);
 
@@ -65,9 +74,9 @@ test("typed array from ArrayBuffer with custom length and offset", () => {
     const uint8ArrayAll = new Uint8Array(arrayBuffer);
     const uint16ArrayPartial = new Uint16Array(arrayBuffer, 2, 4);
     // Affects two bytes of the buffer, beginning at offset
-    uint16ArrayPartial[0] = 52651
+    uint16ArrayPartial[0] = 52651;
     // Out of relative bounds, doesn't affect buffer
-    uint16ArrayPartial[4] = 123
+    uint16ArrayPartial[4] = 123;
     expect(uint8ArrayAll[0]).toBe(0);
     expect(uint8ArrayAll[1]).toBe(0);
     expect(uint8ArrayAll[2]).toBe(0xab);
diff --git a/Libraries/LibJS/Tests/builtins/TypedArray/TypedArray.prototype.length.js b/Libraries/LibJS/Tests/builtins/TypedArray/TypedArray.prototype.length.js
index bbe85a2bf1c..ce02c72391c 100644
--- a/Libraries/LibJS/Tests/builtins/TypedArray/TypedArray.prototype.length.js
+++ b/Libraries/LibJS/Tests/builtins/TypedArray/TypedArray.prototype.length.js
@@ -1,5 +1,14 @@
 // Update when more typed arrays get added
-const TYPED_ARRAYS = [Uint8Array, Uint16Array, Uint32Array, Int8Array, Int16Array, Int32Array];
+const TYPED_ARRAYS = [
+    Uint8Array,
+    Uint16Array,
+    Uint32Array,
+    Int8Array,
+    Int16Array,
+    Int32Array,
+    Float32Array,
+    Float64Array,
+];
 
 test("basic functionality", () => {
     TYPED_ARRAYS.forEach(T => {