WHATWG https://html.spec.whatwg.org/
W3C https://www.w3.org/Style/CSS/
https://cssreference.io/
ECMA TC39 http://www.ecma-international.org/publications/standards/Ecma-262.htm
https://github.com/tc39/proposals
MDN https://developer.mozilla.org/en-US/docs/Web/JavaScript
code-guide
前端开发规范：命名规范、html规范、css规范、js规范
https://github.com/elsewhencode/project-guidelines
