Migrate from Hot Reload to Fast Refresh

Background

I used React to enable HMR for webpack and webpack-dev-server using the following modules, but I didn’t like it because the Functional Component wasn’t updated properly. Since it’s a big deal, I will use react-refresh provided by react recently to make it a cool development environment. Please note that the writing style before the change seems to be old in the first place.

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• @ hot-loader / react-dom
• react-hot-loader

Overview

Remove react-hot-loader and install react-refresh-webpack-plugin .

the manner of the introduction of-Refresh-React Webpack-Plugin, for people who guide came from the react-hot-loader, will continue to make changes in accordance with.

Before

webpack.dev.js

 module: {
    rules: [
      {
        test: /\.(j|t)sx?$/,
        exclude: /node_modules/,
        use: {
          loader: "babel-loader",
        },
      },
/* Omission */
  resolve: {
    alias: {
      "react-dom": "@hot-loader/react-dom",

index.tsx

import React from "react"
import ReactDOM from "react-dom"

function renderApp() {
  ReactDOM.render(<App />, document.querySelector("#root"))
}

if (module.hot) {
  module.hot.accept("components/App/App", () => {
    renderApp()
  })
}

App.ts

import { hot } from "react-hot-loader/root"
import React from "react"

/* Omission */

export default hot(App)

After

• Remove alias for @ hot-loader / react-dom
• Added react-refresh / babel to babel-loader plugins
• Added ReactRefreshWebpackPlugin to plugins

webpack.dev.js

const ReactRefreshWebpackPlugin = require("@pmmmwh/react-refresh-webpack-plugin")



  module: {
    rules: [
      {
        test: /\.(j|t)sx?$/,
        exclude: /node_modules/,
        use: {
          loader: "babel-loader",
          options: {
            plugins: [require.resolve("react-refresh/babel")],
          },


  plugins: [
    new ReactRefreshWebpackPlugin()

Remove module.hot.accept()

index.tsx

import React from "react"
import ReactDOM from "react-dom"

function renderApp() {
  ReactDOM.render(<App />, document.querySelector("#root"))
}

renderApp()

Remove hot()

import React from "react"



export default App

Remove react-hot-loader/babel from .babelrc

.babelrc

-    "react-hot-loader/babel",

Afterword

It was easy. It feels good to update the Functional Component without reloading.