2、cnpm install gulp gulp-if gulp-concat webpack webpack-stream vinyl-named gulp-livereload gulp-plumber gulp-rename gulp-uglify gulp-util yargs --save-dev
cnpm install babel-polyfill --save-dev
cnpm install babel-plugin-transform-decorators-legacy --save-dev
cnpm install jquery --save-dev
//ctrl+enter
//shift + ctrl +enter
//shift+alt +up
//alt+up 上移