The JavaScript Reference

The JavaScript Reference

JavaScript has a complete official reference for everything in the language.

What the reference covers

• Built-in objects: String, Number, Math, Date, Array, Object, JSON, RegExp, Set, Map, Promise, and more.
• Statements: if, for, switch, try, and all keywords.
• Operators: every operator and precedence.
• Functions and classes: syntax, parameters, inheritance.
• Errors: every error type and message.

MDN Web Docs

The best reference is MDN Web Docs (developer.mozilla.org). It has:

• Full docs for every object and method.
• Live examples.
• Browser compatibility tables.
• Clear beginner-friendly explanations.

W3Schools reference

W3Schools also offers a complete JavaScript reference with examples for every property, method, and event.

How to use a reference

1. Look up the object (like Array).
2. Find the method you need (like map).
3. Read the syntax and example.
4. Test it in the console.

TL;DR

• The JS reference covers objects, statements, operators, classes, and errors.
• MDN Web Docs is the top official reference.
• Look up objects, read examples, then test.