As the world's largest platform for open source collaboration, Github is the perfect place for developers to work together on resources related to JavaScript. A quick search will yield JavaScript cheatsheets, interview questions, alogrithms and data structures, best practices, learning paths, and even full open-source books. These repositories can also be a great place to make a first open-source contribution.

'Awesome' JavaScript Lists

• Awesome JavaScript — A collection of awesome browser-side JavaScript libraries, resources and shiny things by user SorryCC.
• Awesome JavaScript — An extensive JavaScript collection from user Iwanjunaid.
• Awesome React — A collection of useful items from the React ecosystem.
• Awesome Node.js — The best Node.js modules and resources.
• Awesome NPM — Tips, packages, community, and docs for the Node package manager.
• Awesome Deno — A collection of the best Deno modules and resources.
• Aweseome Test Automation Resources — A curated list of JavaScript test automation frameworks, tools, and libraries.

Books

• You Don't Know JS — This is a series of books by Kyle Simpson diving deep into the core mechanisms of the JavaScript language.
• Functional Light JavaScript — An advanced look at functional programming with JavaScript.
• The JavaScript Way — A useful companion for anyone wishing to (re)discover the many facets of JavaScript.
• ES6 for Humans — A straightforward guide covering ES6 syntax.

Interview Questions

• JavaScript Interview Questions — 400+ JavaScript interview questions
• Front End Interview Handbook
• JavaScript Questions — Multiple choice JS questions.
• Awesome Interview Questions — Interview questions in many programming languages including JavaScript.
• Interview Questions in JavaScript

Algorithms and Data Structures

• JavaScript Algorithms
• Algorithms in JavaScript
• JavaScript Algorithms and Data Structures
• Data Structures and Algorithms in JavaScript
• Computer Science in JavaScript
• Computer Science in JavaScript
• Problem Solving JavaScript — Data Structures, algorithms, logical problems, and classics implemented in JavaScript.
• JavaScript Data structures and Algorithms

JavaScript Resources

• Github's JavaScript Trending List — The latest trending JavaScript repositories.
• Clean Code JavaScript — Guidelines for readable, reusable, and refactorable JavaScript code. Inspired by Robert C. Martin's book Clean Code.
• Airbnb Style Guide — A reasonable style guide for the JavaScript language.
• ECMAScript proposals — The official JavaScript (formally, ECMAScript) specification. View and contribute to upcoming JavaScript features here.

Learn JavaScript

• ES6 Cheatsheet — ES6 tips, tricks, best practices and code snippets.
• ES6 Overview — Practical insights into ES6 features, with bullet points.
• Modern JS Cheatsheet — A JavaScript guide to help developers with basic knowledge get familiar with modern codebases.
• 33 Concepts — Big concepts in JavaScript explained.
• You Don't Need jQuery — Native ways to do everything in jQuery.
• What the f*ck Ja vaScript? — A list of funny and tricky JavaScript examples.
• Youtube Channels for Frontend Developers