webpack1 study notes

basic introduction

Import documents

// a.js
require('./b.js')
require('style-loader!css-loader!./a.css')

Packed file

// cli
webpack hello.js hello.bundle.js --module-bind 'css=style-loader!css-loader!'

Preview html

// html
<script src='./a.bundle.js'></script>

webpack选项参数
--watch
--progress
--display-modules
--display-reasons
--color
--display-error-details

basic configuration

Create a project
mkdir WebPACK Demo-
cd-Demo WebPACK
npm the init
npm install WebPACK --save-dev
mkdir src
mkdir dist
the VSC // VSCode
create html and introduced bundle.js
create webpack.config.js // refer to the official network configuration API

//模块化输出
module.exports={
    // 
    entry:'./src/script/main.js',
    output:{
        path:'./dist/js',
        filename:'bundle.js'
    },
}
//cli
webpack --config webpack.dev.config.js//指定config文件为webpack.dev.config.js
//

Detailed entry and output

entry three types: single strings, arrays, the object
output eradicate differ entry
[] array
main and sub-main bundle packaged into

module.exports={
    entry:[
    './src/script/main.js',
    './src/script/sub-main.js'
    ],
    output:{
        path:'./dist/js',
        filename:'bundle.js'
    },
}

[Object] - multi-page application
main and packaged into a bundle

module.exports={
    entry:{
        page1:'./src/script/main.js',
        page2:[
            './src/script/main.js',
            './src/script/sub-main.js'
        ],    
    },
    output:{
        path:'./dist/js',
        //【占位符】hash本次 chunkhash静态资源改变后才变化
        filename:'[name]-[hash]-[chunkhash].js'
    },
}

Use plug-ins

html-wabpack-plugin

Action: the introduction of synchronization html js chunkhash

//cli
npm install html-wabpack-plugin --save-dev
//webpack.config.js
var htmlWebpackPlugin=require('html-wabpack-plugin')
module.exports={
    // 上下文的默认环境就是当前运行脚本的目录
    // context:
    entry:{
        page1:'./src/script/main.js',
        page2:[
            './src/script/main.js',
            './src/script/sub-main.js'
        ],    
    },
    output:{
        path:'./dist',
        // js
        filename:'js/[name]-[hash]-[chunkhash].js',
        // 上线环境的
        publicPath:'http://m.mi.com/'
    },
    // 所有plugin都输出到output.path
    plugin:[
        //初始化插件 并传入相关参数
        new htmlWebpackPlugin({
            // 上下文环境 以根目录html作为模板 
            template:'index.html',
            filename:'index-[hash].html',
            inject:'head',//不配置的话 默认放到body标签内
            //向html里面传参,
            //在html用<%= htmlWebpackPlugin.options.title %>接收
            title:'haha',//date:new Date(),
            //压缩html 删除注释和空格
            minify:{
                removeComments:true,
                collapseWhitespace:true
            }
        });
    ]
}

<!-- index.html -->
<!-- 可以编写js的模板引擎<%= 赋值 %><% 执行 %> -->

<% for (var key in htmlWebpackPlugin.files) {%>
<%= key %> : <%= JSON.stringify(htmlWebpackPlugin.files[key]) %>
<% } %>

<% for (var key in htmlWebpackPlugin.options) {%>
<%= key %> : <%= JSON.stringify(htmlWebpackPlugin.files[key]) %>
<% } %>

<!-- 用处 -->
<script src="<%= htmlWebpackPlugin.files.chunks.main.entry%>"></script>

This article is reproduced in: ape 2048➽ https://www.mk2048.com/blog/blog.php?id=hhabb0icbjb