全局安装 ``` npm install gulp -g ``` 局部安装 ``` npm install gulp --save-dev ``` 插件安装 gulp-less ``` npm install gulp-less --save-dev ``` gulp-htmlmin ``` npm install gulp-htmlmin --save-dev ``` gulp-imagemin ``` npm install gulp-imagemin --save-dev ``` gulp-clean-css ``` npm install gulp-clean-css --save-dev ``` gulp-rev-append ``` npm install gulp-rev-append --save-dev ``` gulp-uglify ``` npm install gulp-uglify --save-dev ``` gulp-concat ``` npm install gulp-concat --save-dev ``` gulp-autoprefixer ``` npm install gulp-autoprefixer --save-dev ```