ladybird/Libraries/LibJS/Tests/builtins/JSON/JSON.parse-reviver.js

test("basic functionality", () => {
  let string = `{"var1":10,"var2":"hello","var3":{"nested":5}}`;

  let object = JSON.parse(string, (key, value) => (typeof value === "number" ? value * 2 : value));
  expect(object).toEqual({ var1: 20, var2: "hello", var3: { nested: 10 } });

  object = JSON.parse(string, (key, value) => (typeof value === "number" ? undefined : value));
  expect(object).toEqual({ var2: "hello", var3: {} });
});