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gulp-easy-use's Introduction

Gulp

在有node环境下:
npm install gulp -g // 先全局安装
npm install gulp -S //再到指定目录下安装,这是个坑,全局和本地都得装
npm install

gulp实用插件

  • 编译 Sass:gulp-sass
  • 编译 Less:gulp-less
  • 合并文件:gulp-concat
  • 压缩js 文件:gulp-uglify
  • 重命名js文件:gulp-rename
  • 优化图像大小:gulp-imagemin
  • 压缩css 文件:gulp-minify-css
  • 创建本地服务器:gulp-connect
  • 实时预览:gulp-connect
  • 按指定顺序执行:run-sequence
  • 浏览器兼容前缀:gulp-autoprefixer

gulp API

​ 在Gulp中,使用的是Nodejs中的stream(流),首先获取到需要的stream,通过stream的pipe()方法把流导入到你想要的地方,比如Gulp的插件中,经过插件处理后的流又可以继续导入到其他插件中,当然也可以把流写入到文件中。

gulp.src() // 获取文件流
gulp.dest() // 生成文件路径
gulp.task(name,[, deps], function(){}) // 定义任务
name 是任务名,deps是任务依赖组,表示当前定义的任务会在所有的依赖执行完毕后才执行
如果依赖是一个异步操作,不会等待所依赖的异步任务完成,直接执行当前后续任务
如果需要等待异步执行完成再执行后续的任务
 gulp.task('sync',function(done){ //done是任务函数的回调,用来通知任务已经完成
  setTimeout(function(){
    console.log('done');
    done();  //执行回调,表示这个异步任务已经完成
  },5000);
});
gulp.watch(glob,function(){}) // 监视文件的变化,当文件变化后,执行相应的任务

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