自定义开发服务器_2_使用webpack_dev_middleware和express

官网指南中讲解了如何使用webpack-dev-middleware和express配置自定义服务器，但没有热更新功能。

在官网查找了一下，终于解决了这一问题：

1，必备依赖插件，使用npm/yarn安装即可：（需单独安装webpack-hot-middleware)

  "dependencies": {

    "clean-webpack-plugin": "^3.0.0",

    "express": "^4.17.1",

    "html-webpack-plugin": "^4.5.0",

    "lodash": "^4.17.20",

    "webpack": "^5.10.0",

    "webpack-cli": "^4.2.0",

    "webpack-dev-middleware": "^4.0.2",

    "webpack-hot-middleware": "^2.25.0"

  }

2，webpack.config.js配置：（热更新插件内置在webpack中，调用即可）

const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
const  webpack  = require('webpack');

module.exports = {
    mode:'development',
    entry:[
        "./src/index.js","webpack-hot-middleware/client?path=/__webpack_hmr&timeout=20000&reload=true"
    ],
    plugins:[
        new CleanWebpackPlugin({cleanStaleWebpackAssets:false}),
        new HtmlWebpackPlugin({
            title:'Development',
        }),
        new webpack.HotModuleReplacementPlugin(),
        new webpack.NoEmitOnErrorsPlugin()
    ],
    output:{
        filename:'[name].bundle.js',
        path:path.resolve(__dirname,'dist'),
        publicPath:'/',
    },
};

3，server.js配置：

const express = require('express');
const webpack = require('webpack');
const webpackDevMiddleware = require('webpack-dev-middleware');
const webpackHotMiddleware = require('webpack-hot-middleware');

const app = express();
const config = require('./webpack.config');
const compiler = webpack(config);

app.use(
    webpackDevMiddleware(compiler, {
        publicPath:config.output.publicPath,
    })
);
app.use(
    webpackHotMiddleware(compiler, {
        path:'/__webpack_hmr',heartbeat:10 * 1000
    })
)


app.get("/",function(req,res){
    res.sendFile(__dirname + '/dist/index.html');
});

app.listen(3000, function () {
    console.log('Example app listening on port 3000!\n');
  });