exports.postfactory = function (opts) {
  return [
    //css中引入内联样式表
    // require('postcss-easy-import')(),
    //css混合宏的使用
    require('postcss-mixins')(),
    //css的for循环插件  必须在postcss-simple-vars之前运行
    require('postcss-for')(),
    require('postcss-each')(),
    //类似于sass语法的css变量定义
    require('postcss-simple-vars')(),
    //sass扩展语法
    require('postcss-sass-extend')(),
    //css媒体查询简写   https://github.com/postcss/postcss-media-minmax/blob/master/README-zh.md
    require('postcss-media-minmax')(),
    //css层级写法  https://github.com/postcss/postcss-nested
    require('postcss-nested')(),
    //css选择器简写
    require('postcss-selector-matches')(),
    require('postcss-selector-not')(),
    //css缩写与简写  crip的缩写列表 https://github.com/johnie/crip-css-properties
    require('postcss-alias')(),
    require('postcss-crip')(),
    //css浏览器兼容
    require('autoprefixer')({ browsers: ['last 2 versions'] }),
    //css计算
    require("postcss-calc")
  ];
}
