- Online real time markdown https://stackedit.io/editor
- Online JS console : https://jsconsole.com/
- Auto generate TOC from markdown : https://ecotrust-canada.github.io/markdown-toc/
- Mockup : https://webdemo.balsamiq.com/
- You-Dont-Know-JS by Kyle Simpson : https://github.com/getify/You-Dont-Know-JS/
- Mozilla Developer Network (MDN) : https://developer.mozilla.org/en-US/docs/Web/JavaScript
- Standard ECMA-262 5.1 Edition / June 2011 http://www.ecma-international.org/ecma-262/5.1/
- Standard ECMA-262 6th Edition / June 2015 http://www.ecma-international.org/ecma-262/6.0/
- Principles of Writing Consistent, Idiomatic JavaScript : https://github.com/rwaldron/idiomatic.js
- JavaScript Standard Style : https://github.com/feross/standard
- freecodecamp : http://beta.freecodecamp.com/en/map
- codewars : https://www.codewars.com
- All : http://codecondo.com/coding-challenges/