webpack 打包js css html image

1.安装webpack

   npm install webpack webpack-cli -g

   npm install webpack webpack-cli  --save-dev

2.安装css插件

   .npm i css-loader style-loader

3.安装html插件

  npm i -D html-webpack-plugin 

  npm i html-webpack-plugin -g --save-dev

4.安装热启动插件

  npm install webpack-dev-server -g --save-dev

{
  "name": "school",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo "Error: no test specified" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "css-loader": "^5.0.0",
    "style-loader": "^2.0.0"
  },
  "devDependencies": {
    "html-webpack-plugin": "^4.5.0",
    "webpack": "^5.1.3",
    "webpack-cli": "^4.1.0"
  }
}

var HtmlWebpackPlugin = require('html-webpack-plugin'); //打包html的插件
module.exports = {
    entry:'./src/entry.js',

    output:{
        filename:'bundle.js'
    },

    module: {
        rules: [
            {
                test: /.css$/,   // 正则表达式，表示.css后缀的文件
                use: ['style-loader','css-loader']   // 针对css文件使用的loader，注意有先后顺序，数组项越靠后越先执行
            }
        ]
    },

    plugins:[
        new HtmlWebpackPlugin({

            filename:'index.html',
            template:'src/index.html'
        })
    ]
}