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.

What is JSON (JavaScript Object Notation)? JSON (JavaScript Object Notation) is a text-based, human-readable data interchange format used to exchange data between web clients and web servers. The ...

Get tips for instantiating JavaScript's prototype-based objects two ways: via constructor functions or object initialization.

JavaScript is the the programming language that built the web. Learn how it evolved into a powerful tool for building websites, servers with Node.js, mobile apps, desktop software, and more.