es5 -> es6

- module.exports/require -> import/export
- self/that -> () => {}
- var -> let/const
- object-shorthand
- key: key -> key
- a: function() {} -> a() {}

install the followings globally

npm i pm2 npm-run-all rimraf cross-env webpack postcss-cli -g --registry=https://registry.npm.taobao.org

- In production, run sudo npm run pm2:prod. If EACCES read https://github.com/Unitech/pm2/issues/456. In short, just pm2 kill before sudo.

install the followings locally which can not be installed globally

``javascript
npm i watch rimraf fs-extra eslint-config-zorojs --save-dev
npm i webpack webpack-dev-server html-loader json-loader raw-loader yaml-loader style-loader css-loader --save-dev
npm install postcss postcss-cli postcss-loader precss postcss-calc autoprefixer postcss-sprites --save-dev
// http://stackoverflow.com/questions/33512715/babel-6-0-20-modules-feature-not-work-in-ie8
// https://www.npmjs.com/package/babel-plugin-add-module-exports
npm install babel-loader babel-core babel-preset-es2015 babel-preset-stage-3 babel-plugin-transform-es3-member-expression-literals babel-plugin-transform-es3-property-literals babel-plugin-add-module-exports --save-dev
`

install the followings devDependencies globally or locally

`
npm install regular-state regularjs stateman -g
npm install lodash -g
npm install once -g
npm install url -g
npm install xhr -g
``

problems

https://github.com/eslint/eslint/issues/6274#issuecomment-228420692

koa

npm i -g koa@next koa-compose@next koa-convert koa-mount@next koa-router@next koa-send koa-session koa-static@next koa-bodyparser@next