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 = 8080
const HTTPS = false

module.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。