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Question 7 of 521

Part 1: Core Objects, Prototypes, Functions & Scope (1 - 53)

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JavaScript Internals (521 Qs)•Part 1: Core Objects, Prototypes, Functions & Scope (1 - 53)

What is JSON and its common operations

JSON (JavaScript Object Notation) is a lightweight, text-based data format that uses JavaScript object syntax for structuring data. It was popularized by Douglas Crockford and is widely used for transmitting data between a server and a client in web applications. JSON files typically have a .json extension and use the MIME type application/json.

Common Operations with JSON

  1. Parsing: Transforming a JSON-formatted string into a native JavaScript object.
js
  const obj = JSON.parse(jsonString);
  • Example:
js
    const jsonString = '{"name":"John","age":30}';
    const obj = JSON.parse(jsonString);  // { name: "John", age: 30 }
  1. Stringification: Converting a JavaScript object into a JSON-formatted string, commonly used for data transmission or storage.
js
  const jsonString = JSON.stringify(object);
  • Example:
js
    const obj = { name: "Jane", age: 25 };
    const jsonString = JSON.stringify(obj);  // '{"name":"Jane","age":25}'