Built-in JavaScript objects and functions are ones you'll use all the time. Here's how to use Object, JSON, String, Math, Date, and console in your JavaScript programs.

JSON is the leading data interchange format for web applications and more. Here’s what you need to know about JavaScript Object Notation.

It does have more limitations, and JSON is more flexible. JSON also enables more complex data structures to be used in it than HTML. For example, HTML can't store values inside variables. Learn more ...