11 loader

1.装包

cnpm i sass-loader -D

peerDependencies WARNING sass-loader@* requires a peer of node-sass@^4.0.0 but none was installed
peerDependencies WARNING sass-loader@* requires a peer of sass@^1.3.0 but none was installed
peerDependencies WARNING sass-loader@* requires a peer of fibers@>= 3.1.0 but none was installed

使用npm安装sass-loader一般是安装不下来的，所以使用cnpm安装

cnpm i node-sass -D

2.配置规则

module:{//这个节点，用于配置所有第三方模块加载器
        rules:[//所有第三方模块的匹配规则           
            {test:/.scss$/,use:['style-loader','css-loader','sass-loader']},//配置处理.scss文件的第三方loader规则
        ]
    }

注意：webpack 1.x版本匹配规则可以省略loader

     rules:[//所有第三方模块的匹配规则           
         {test:/.scss$/,use:['style','css','sass']},//配置处理.scss文件的第三方loader规则
        ]