Reference, Cheatsheets & Utilities – Learn JavaScript

About Reference, Cheatsheets & Utilities

Quick references and utilities that complement course learning.

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Bookmark a few; avoid tab bloat.
Prefer sources that update regularly (MDN, official docs).
Use offline mirrors (DevDocs) when traveling.

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Reference, Cheatsheets & Utilities

MDN – JavaScript Reference — Authoritative reference
DevDocs – JS & Web APIs — Fast, searchable offline docs
You Don't Know JS (2nd ed.) — Deep‑dive book series
Airbnb JavaScript Style Guide — Widely used style guide
TC39 – Spec — ECMAScript language spec
NPM Trends – Compare Packages — Popularity comparisons
Bundlephobia – Package Size — Size & load time impact
Can I use – Browser Support — Feature compatibility tables
RegexOne – Learn Regular Expressions — Interactive regex lessons
JSONPlaceholder – Fake API — Test fetch calls