webpack5之devServer

Posted 2021-04-23 开发手记

现在我们每次更改src目录下文件的时候，都需要手动运行一下打包命令，这是非常不利于开发体验的，因此，我们需要改良一下，引入webpack-dev-server。

npm i webpack-dev-server -D

webpack.config.js的配置如下：（webpack5必须要配置target）

const { resolve } = require('path');const htmlWebpackPlugin = require('html-webpack-plugin');//打包htmlconst miniCssExtractPlugin = require('mini-css-extract-plugin');//分离样式const OptimizeCssAssetsWebpackPlugin = require('optimize-css-assets-webpack-plugin');//压缩cssmodule.exports = { entry: './src/main.js', output: { filename: 'bundle.js', path: resolve(__dirname, 'dist') }, module: { rules: [ { test: /\.css$/, use: [miniCssExtractPlugin.loader, 'css-loader', 'postcss-loader'] }, { test: /\.less$/, use: [miniCssExtractPlugin.loader, 'css-loader', 'postcss-loader', 'less-loader'] }, { test: /\.scss$/, use: [miniCssExtractPlugin.loader, 'css-loader', 'postcss-loader', 'sass-loader'] }, { test: /\.(jpg|jpeg|png|gif)$/, loader: "url-loader", options: { limit: 1024 * 10, outputPath: 'imgs', publicPath: './imgs', esModule: false } }, { test: /\.(htm|html)$/, loader: 'html-loader', options: { esModule: false } }, { test: /\.(eot|woff|ttf|svg)$/, loader: 'file-loader', options: { outputPath: 'fonts', publicPath: './fonts' } } ] }, plugins: [ new HtmlWebpackPlugin({ template: './src/assets/index.html', hash: true, filename: 'index.html', favicon: './src/assets/favicon.ico' }), new miniCssExtractPlugin({ filename: 'index.css' }), new OptimizeCssAssetsWebpackPlugin() ], mode: 'development', devServer: { contentBase: resolve(__dirname, 'dist'),//打包后的文件路径 open: true,//自动打开浏览器 compress: true,//启动gzip压缩 port: 3000,//端口号 }, target: 'web',}

package.json的配置如下：（运行一下npm run serve就OK啦）

{ "name": "wpk5-demo", "version": "1.0.0", "description": "", "main": "index.js", "scripts": { "serve": "npx webpack serve", "build": "npx webpack" }, "keywords": [], "author": "", "license": "ISC", "devDependencies": { "css-loader": "^5.2.0", "file-loader": "^6.2.0", "html-loader": "^2.1.2", "html-webpack-plugin": "^5.3.1", "less": "^4.1.1", "less-loader": "^8.0.0", "mini-css-extract-plugin": "^1.4.0", "node-sass": "^5.0.0", "optimize-css-assets-webpack-plugin": "^5.0.4", "postcss-loader": "^5.2.0", "postcss-preset-env": "^6.7.0", "sass-loader": "^11.0.1", "style-loader": "^2.0.0", "url-loader": "^4.1.1", "webpack": "^5.28.0", "webpack-cli": "^4.5.0", "webpack-dev-server": "^3.11.2" }, "browserslist": [ "> 1%", "last 2 versions", "not ie <= 8" ]}

https://gitee.com/seimin/xiaoming2qianduan-webpack5/tree/v5.8/