JavaScript’s built-in objects include Object, JSON, console, String, Math, Date, and the window and global objects. These are some of the most important and useful parts of the JavaScript language.

Introducing JavaScript Object Notation JavaScript Object Notation (JSON) is a lightweight data-interchange format. It is easy for humans to read and write, and easy for machines to parse and generate.

JSON has stolen some of XML's thunder with features such as human and machine readability, a lightweight, compact text structure and support for many software and hardware platforms. JSON (JavaScript ...