最近搞了一个webpack4+typescript的开发环境，折腾了很久现在记录一下。。。。

本身环境比较好搞，但是热更新是个麻烦事儿

本环境是基于webpack-dev-server搭建的

output: { publicPath: '/dist', path: path.resolve(__dirname, 'dist'), filename: 'ljax.bundle.js', hotUpdateChunkFilename: 'hot/hot-update.js', hotUpdateMainFilename: 'hot/hot-update.json' },

publicPath是必须的字段，不添加HRM就没有效果

在热更新的时候会出现很多hot-update.js和hot-update.json的细碎文件

使用hotUpdateChunkFilename和hotUpdateMainFilename指定他们只生成一个文件，目前没有找到不生成这两个文件的办法，如果哪位大佬知道的话请告知。

plugins: [ new HtmlWebpackPlugin({ title: '模块热替换', template: './public/index.html' }), new webpack.HotModuleReplacementPlugin(), // 启动输出清理 new FriendlyErrorsWebpackPlugin({ compilationSuccessInfo: { messages: [`You application is running here ${HTTPS ? 'https' : 'http'}://${HOST}:${PORT}`], // notes: ['Some additional notes to be displayed upon successful compilation'], clearConsole: true }, }) ],

HotModuleReplacementPlugin是热更新必不可少的插件

contentBase: __dirname, quiet: true, compress: true, port: PORT, host: HOST, https: HTTPS, // hot: true, // hotOnly: true, // inline: true, open: true, overlay: true, openPage: './dist/index.html'

最坑的地方来了，我一开始是加上可hot和hotOnly字段的，但是不管是两个都加还是单独使用任何一个，HRM都没有效果。。。。

最后发现两个都不实用就可以。。。。。妈耶，我还是从官网看的这个配置。

到现在也不是很了解是怎么回事。。

最后，贴一下完整的配置吧

webpack.config.js

const path = require('path')const FriendlyErrorsWebpackPlugin = require('friendly-errors-webpack-plugin')const webpack = require('webpack')const HtmlWebpackPlugin = require('html-webpack-plugin')const HOST = 'localhost'const PORT = 8080const HTTPS = falsemodule.exports = { mode: 'development', context: __dirname, entry: { app: './src/index.ts' }, output: { publicPath: '/dist', path: path.resolve(__dirname, 'dist'), filename: 'ljax.bundle.js', hotUpdateChunkFilename: 'hot/hot-update.js', hotUpdateMainFilename: 'hot/hot-update.json' }, module: { rules: [ { test: /\.ts/, use: 'ts-loader', exclude: /node_modules/ } ] }, resolve: { extensions: ['.ts', '.js'] }, plugins: [ new HtmlWebpackPlugin({ title: '模块热替换', template: './public/index.html' }), new webpack.HotModuleReplacementPlugin(), // 启动输出清理 new FriendlyErrorsWebpackPlugin({ compilationSuccessInfo: { messages: [`You application is running here ${HTTPS ? 'https' : 'http'}://${HOST}:${PORT}`], // notes: ['Some additional notes to be displayed upon successful compilation'], clearConsole: true }, }) ], devServer: { contentBase: __dirname, quiet: true, compress: true, port: PORT, host: HOST, https: HTTPS, // hot: true, // hotOnly: true, // inline: true, open: true, overlay: true, openPage: './dist/index.html' }}

package.json

{ "name": "ljax", "version": "1.0.0", "description": "", "main": "index.js", "scripts": { "test": "echo \"Error: no test specified\" && exit 1", "watch": "webpack -w", "dev-server": "webpack-dev-server", "serve": "start yarn dev-server && yarn watch" }, "author": "", "license": "ISC", "dependencies": { "friendly-errors-webpack-plugin": "^1.7.0", "html-webpack-plugin": "^3.2.0", "ts-loader": "^6.0.4", "typescript": "^3.5.3", "webpack": "^4.39.1", "webpack-dev-server": "^3.7.2" }, "devDependencies": { "webpack-cli": "^3.3.6" }}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。