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.

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.

Topics covered include: Object creation Bracket vs Dot Notation Property descriptors How object references work Prototype chain Modern syntax like spread and destructuring Loop over objects Custom ...