webpack-010 devServer边看边开发

// 1. 安装插件  npm i webpack-dev-server -D
const htmlWebpackPlugin = require("html-webpack-plugin");
module.exports = {
    entry: {
        common: './src/js/common.js',
    },

    plugins: [
        new htmlWebpackPlugin({
            template: './src/index.html',
            filename: 'index.html',
            chunks: ['common'],
            minify: false
        })
    ],
    // webpack让浏览器自动刷新
    target: 'web',
    // 一些设置 优先级别package.json文件里高
    devServer: {
        // 是否自动开启浏览器
        open: true,
        // 设置端口
        port: 5555
    }
}

还可以在package.json里直接设置

{
  "name": "webpack",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "webpackv": "webpack -v",
    // 开发模式并设置端口
    "dev": "webpack serve --mode development --port 5555",
    "build": "webpack --mode production"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "css-loader": "^5.2.6",
    "file-loader": "^6.2.0",
    "html-loader": "^1.3.2",
    "html-webpack-plugin": "^5.3.1",
    "less": "^4.1.1",
    "less-loader": "^9.1.0",
    "mini-css-extract-plugin": "^1.6.0",
    "optimize-css-assets-webpack-plugin": "^6.0.0",
    "postcss-loader": "^6.1.0",
    "postcss-preset-env": "^6.7.0",
    "style-loader": "^2.0.0",
    "url-loader": "^4.1.1",
    "webpack": "^5.37.1",
    "webpack-cli": "^4.7.0",
    "webpack-dev-server": "^3.11.2"
  },
  "browserslist": [
    "> 1%",
    "last 2 versions",
    "not dead"
  ]
}