websocket4.0+typescript 实现热更新的方法

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' }}