Webpack core loader (C) - the use of third-party libraries

 

1. the document introduction inlet

: As long as introduced will be packed

 

cnpm i jquey -S

index.js

import $ from 'jquey';

$('ul li:last-child').css('background','pink')

 

2.Webpack.ProvidePlugin // recommended the introduction of this

• Automatically load the module, without having to use the import or require
• If the load module is not used, it will not be packaged
• Loaded modules as a global module, can be used in the global (and import documents can only be used where the entrance to load the file)

const webpack = require('webpack'); //引入热更新插件


module.exports = {
    entry:'./src/js/index.js',  //入口起点
    output:{ //输出
        path:path.resolve(__dirname,'dist'), //目标输出目录的绝对路径
        filename:'js/boundle.js'  //输出文件的文件名
    },
    plugins:[
        new webpack.ProvidePlugin({
            $:'jquery'   //引入第三方库
        }),
       
    ],
   module:{
       rules:[//对象
           //这里面放的就是一个个的loader,每一个loader要放在一个对象里,这里面的内容不能变，从后往前解析
           {
           },
   }
}

-S placed in a production environment, not only the development environment and the on-line environment is also required

cnpm i jquey -S // jqeury as an example