Cheatsheets

JavaScript Cheatsheet

Markdown Cheatsheet

Coding Challenges

Javascript Challenges

JavaScript Code Challenges for Beginners

HTML and CSS Code Challenges for Beginners

Edabit website

w3schools (Recommended)

JavaScript Tutorials

JavaScript Test Exercises

HTML Tutorials

HTML Test Exercises

CSS Tutorials

CSS Test Exercises

Alison Learn

A Beginners Guide to JavaScript

Diploma in HTML5, CSS3 and JavaScript

Udacity

Intro to JavaScript

JavaScript and the DOM

CodeCademy

Learn JavaScript

HTMLCheatsheet.com

HTML

CSS

JS