Online Tools

caniuse

Support tables for HTML5, CSS3, etc

regex101

RegExp Online Testing

JSON Editor Online

Front End JSON Editor

Test My Site

Test how mobile-friendly your site is

JSON formatter

JSON formatter

Jade Converter

html to Pug/Jade

CodePad

online coding interview

reveal.js

presentations using HTML

Hackerrank

online test



Color

ColorPK

By ZJ Guo

Palettab

Discover new discover fonts and colors

ColourCode

find color scheme

Coolors

find cool colors

UI Gradients

colored gradient



Online Tutorial

JavaScript秘密花园

Javascript入门文档

React + Webpack

Gitbook 英文原版

ES6 入门

阮一峰:开源的 JavaScript 语言教程

JS Tips

Javascript tips everyday

W3Schools

Web Dev tutorial

React.js小书

胡子大哈

廖雪峰JS教程

blog, tutorial and QA

re-intro to JS

MDN Tutorial

前端九部

支付宝内部资料



JS Style

StandardJS

Javascript Standard Style

airbnb JavaScript

airbnb javascript style guide

Vanilla JS

You may not need jQuery



Blog

Code For Geek

Programming blog

Richard Clayton

Unrepentant Thoughts on code

Coding Horror

Jeff Atwood!!!

Angular in depth

advanced rxjs

Hackages Blog

home for js & web

Addy Osmani

design pattern



Github Community

best of JS

github feature package

javascripting

database for js source



Performance Tool

TestMySite

Mobile Speed By Google

Lighthouse

By Google

Sitespeed.io

Measuring performance

Global Latency

speed test

Bundlephobia

bundle package size



Convert



Licenced Library

Disqus

comment bar

Intercom

online messaging



Cheat Sheet



Online Sandbox

CodePen

Online Front End Playground

JS Bin

Collaborative JavaScript Debugging

Liveweave

online JS

Plunker

online web development

CSS Deck

online css portfolio

JSFiddle

JavaScript Fiddle with boilerplate

CodeSandbox

Powerful online code editor