《webpack学习》- 入门使用DevServer

在实际开发中，除了打包我们可能还需要一下功能：

• 提供HTTP服务而不是使用本地文件预览
• 监听文件变化并自动刷新网页，做好实时预览
• 支持Source Map, 方便调试

webpack原生支持2，3点内容，再结合官方提供的开发工具DevServer也可以很方便的实现第一点。

DevServer

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

pacakge.js

{
  "name": "webpack-test",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "dev": "webpack serve"
  },
  "author": "zzh",
  "license": "ISC",
  "devDependencies": {
    "@webpack-cli/serve": "^1.5.2",
    "css-loader": "^6.2.0",
    "extract-text-webpack-plugin": "^3.0.2",
    "mini-css-extract-plugin": "^2.2.0",
    "style-loader": "^3.2.1",
    "webpack-cli": "^4.8.0",
    "webpack-dev-server": "^4.0.0"
  },
  "dependencies": {
    "webpack": "^5.50.0"
  }
}

wepack.config.js

const path =  require('path');

const MiniCssExtractPlugin = require("mini-css-extract-plugin");

module.exports = {
    mode:'development',
    entry: './main.js',
    output: {
        filename: 'bundle.js',
        path: path.resolve(__dirname, './dist'),
        publicPath:'./'
    },
    plugins: [new MiniCssExtractPlugin()],
    module: { 
        rules: [
            {
              test: /\.css$/i,
              use: [MiniCssExtractPlugin.loader, "css-loader"],
            },
          ],
     }, 

     devServer: {
       static: {
        directory: path.join(__dirname, './'),
       },
     },
};

运行npm run dev即可.
注意这里的wepack里面的devServer配置，修改了服务的打开地址，默认是./public文件夹。

参考地址

https://blog.csdn.net/weixin_40599109/article/details/109582365

https://blog.csdn.net/weixin_48383757/article/details/109824003