chore[devtools]: upgrade to webpack v5

packages/react-devtools-core/src/standalone.js

@@ -299,8 +299,8 @@ type LoggerOptions = {
 };
 
 function startServer(
-  port?: number = 8097,
-  host?: string = 'localhost',
+  port: number = 8097,
+  host: string = 'localhost',
   httpsOptions?: ServerOptions,
   loggerOptions?: LoggerOptions,
 ): {close(): void} {

packages/react-devtools-core/webpack.backend.js

@@ -1,5 +1,5 @@
 const {resolve} = require('path');
-const {DefinePlugin} = require('webpack');
+const Webpack = require('webpack');
 const {
   DARK_MODE_DIMMED_WARNING_COLOR,
   DARK_MODE_DIMMED_ERROR_COLOR,
@@ -62,10 +62,13 @@ module.exports = {
     },
   },
   node: {
-    fs: 'empty',
+    global: false,
   },
   plugins: [
-    new DefinePlugin({
+    new Webpack.ProvidePlugin({
+      process: 'process/browser',
+    }),
+    new Webpack.DefinePlugin({
       __DEV__,
       __EXPERIMENTAL__: true,
       __EXTENSION__: false,

packages/react-devtools-core/webpack.standalone.js

@@ -1,5 +1,5 @@
 const {resolve} = require('path');
-const {DefinePlugin} = require('webpack');
+const Webpack = require('webpack');
 const {
   DARK_MODE_DIMMED_WARNING_COLOR,
   DARK_MODE_DIMMED_ERROR_COLOR,
@@ -75,9 +75,14 @@ module.exports = {
     // This would break the standalone DevTools ability to load the backend.
     // see https://github.com/facebook/react-devtools/issues/1269
     __dirname: false,
+
+    global: false,
   },
   plugins: [
-    new DefinePlugin({
+    new Webpack.ProvidePlugin({
+      process: 'process/browser',
+    }),
+    new Webpack.DefinePlugin({
       __DEV__,
       __EXPERIMENTAL__: true,
       __EXTENSION__: false,

packages/react-devtools-extensions/build.js

@@ -56,14 +56,7 @@ const build = async (tempPath, manifestPath) => {
   const binPath = join(tempPath, 'bin');
   const zipPath = join(tempPath, 'zip');
 
-  const webpackPath = join(
-    __dirname,
-    '..',
-    '..',
-    'node_modules',
-    '.bin',
-    'webpack',
-  );
+  const webpackPath = join(__dirname, 'node_modules', '.bin', 'webpack');
   execSync(
     `${webpackPath} --config webpack.config.js --output-path ${binPath}`,
     {

packages/react-devtools-extensions/package.json

@@ -33,6 +33,7 @@
     "babel-eslint": "^9.0.0",
     "babel-loader": "^8.0.4",
     "babel-preset-minify": "^0.5.1",
+    "buffer": "^6.0.3",
     "chalk": "^4.1.1",
     "child-process-promise": "^2.2.1",
     "chrome-launch": "^1.1.4",
@@ -54,14 +55,15 @@
     "open": "^7.0.2",
     "os-name": "^3.1.0",
     "parse-filepath": "^1.0.2",
+    "process": "0.11.10",
     "raw-loader": "^3.1.0",
     "source-map-js": "^0.6.2",
     "sourcemap-codec": "^1.4.8",
     "style-loader": "^0.23.1",
-    "webpack": "^4.43.0",
-    "webpack-cli": "^3.3.11",
-    "webpack-dev-server": "^3.10.3",
-    "workerize-loader": "^1.3.0"
+    "webpack": "^5.82.1",
+    "webpack-cli": "^5.1.1",
+    "webpack-dev-server": "^4.15.0",
+    "workerize-loader": "^2.0.2"
   },
   "dependencies": {
     "web-ext": "^4"

packages/react-devtools-extensions/webpack.backend.js

@@ -1,7 +1,7 @@
 'use strict';
 
 const {resolve} = require('path');
-const {DefinePlugin} = require('webpack');
+const Webpack = require('webpack');
 const {
   DARK_MODE_DIMMED_WARNING_COLOR,
   DARK_MODE_DIMMED_ERROR_COLOR,
@@ -36,7 +36,7 @@ const featureFlagTarget = process.env.FEATURE_FLAG_TARGET || 'extension-oss';
 
 module.exports = {
   mode: __DEV__ ? 'development' : 'production',
-  devtool: __DEV__ ? 'cheap-module-source-map' : false,
+  devtool: __DEV__ ? 'cheap-module-source-map' : 'nosources-cheap-source-map',
   entry: {
     backend: './src/backend.js',
   },
@@ -45,12 +45,7 @@ module.exports = {
     filename: 'react_devtools_backend_compact.js',
   },
   node: {
-    // Don't define a polyfill on window.setImmediate
-    setImmediate: false,
-
-    // source-maps package has a dependency on 'fs'
-    // but this build won't trigger that code path
-    fs: 'empty',
+    global: false,
   },
   resolve: {
     alias: {
@@ -66,7 +61,10 @@ module.exports = {
     minimize: false,
   },
   plugins: [
-    new DefinePlugin({
+    new Webpack.ProvidePlugin({
+      process: 'process/browser',
+    }),
+    new Webpack.DefinePlugin({
       __DEV__: true,
       __PROFILE__: false,
       __DEV____DEV__: true,

packages/react-devtools-extensions/webpack.config.js

@@ -1,7 +1,7 @@
 'use strict';
 
 const {resolve} = require('path');
-const {DefinePlugin} = require('webpack');
+const Webpack = require('webpack');
 const {
   DARK_MODE_DIMMED_WARNING_COLOR,
   DARK_MODE_DIMMED_ERROR_COLOR,
@@ -66,12 +66,7 @@ module.exports = {
     chunkFilename: '[name].chunk.js',
   },
   node: {
-    // Don't define a polyfill on window.setImmediate
-    setImmediate: false,
-
-    // source-maps package has a dependency on 'fs'
-    // but this build won't trigger that code path
-    fs: 'empty',
+    global: false,
   },
   resolve: {
     alias: {
@@ -88,7 +83,11 @@ module.exports = {
     minimize: false,
   },
   plugins: [
-    new DefinePlugin({
+    new Webpack.ProvidePlugin({
+      process: 'process/browser',
+      Buffer: ['buffer', 'Buffer'],
+    }),
+    new Webpack.DefinePlugin({
       __DEV__,
       __EXPERIMENTAL__: true,
       __EXTENSION__: true,

packages/react-devtools-inline/package.json

@@ -37,14 +37,16 @@
     "babel-core": "^7.0.0-bridge",
     "babel-eslint": "^9.0.0",
     "babel-loader": "^8.0.4",
+    "buffer": "^6.0.3",
     "cross-env": "^3.1.4",
     "css-loader": "^1.0.1",
     "file-loader": "^6.1.0",
+    "process": "^0.11.10",
     "raw-loader": "^3.1.0",
     "style-loader": "^0.23.1",
-    "webpack": "^4.43.0",
-    "webpack-cli": "^3.3.11",
-    "webpack-dev-server": "^3.10.3",
-    "worker-loader": "^3.0.3"
+    "webpack": "^5.82.1",
+    "webpack-cli": "^5.1.1",
+    "webpack-dev-server": "^4.15.0",
+    "workerize-loader": "^2.0.2"
   }
 }

packages/react-devtools-inline/webpack.config.js

@@ -1,5 +1,5 @@
 const {resolve} = require('path');
-const {DefinePlugin} = require('webpack');
+const Webpack = require('webpack');
 const {
   DARK_MODE_DIMMED_WARNING_COLOR,
   DARK_MODE_DIMMED_ERROR_COLOR,
@@ -43,10 +43,12 @@ module.exports = {
   },
   output: {
     path: __dirname + '/dist',
+    publicPath: '/dist/',
     filename: '[name].js',
     chunkFilename: '[name].chunk.js',
-    library: '[name]',
-    libraryTarget: 'commonjs2',
+    library: {
+      type: 'commonjs2',
+    },
   },
   externals: {
     react: 'react',
@@ -56,9 +58,7 @@ module.exports = {
     scheduler: 'scheduler',
   },
   node: {
-    // source-maps package has a dependency on 'fs'
-    // but this build won't trigger that code path
-    fs: 'empty',
+    global: false,
   },
   resolve: {
     alias: {
@@ -69,7 +69,11 @@ module.exports = {
     minimize: false,
   },
   plugins: [
-    new DefinePlugin({
+    new Webpack.ProvidePlugin({
+      process: 'process/browser',
+      Buffer: ['buffer', 'Buffer'],
+    }),
+    new Webpack.DefinePlugin({
       __DEV__,
       __EXPERIMENTAL__: true,
       __EXTENSION__: false,

packages/react-devtools-shared/src/hooks/parseHookNames/loadSourceAndMetadata.js

@@ -315,7 +315,7 @@ function extractAndLoadSourceMapJSON(
 
 function fetchFile(
   url: string,
-  markName?: string = 'fetchFile',
+  markName: string = 'fetchFile',
 ): Promise<string> {
   return withCallbackPerfMeasurements(`${markName}("${url}")`, done => {
     return new Promise((resolve, reject) => {

packages/react-devtools-shell/constants.js

@@ -0,0 +1,5 @@
+const SUCCESSFUL_COMPILATION_MESSAGE = 'Compiled successfully.';
+
+module.exports = {
+  SUCCESSFUL_COMPILATION_MESSAGE,
+};

packages/react-devtools-shell/package.json

@@ -3,7 +3,7 @@
   "name": "react-devtools-shell",
   "version": "0.0.0",
   "scripts": {
-    "start": "cross-env NODE_ENV=development cross-env TARGET=local webpack-dev-server"
+    "start": "cross-env NODE_ENV=development node ./webpack-server.js"
   },
   "dependencies": {
     "immutable": "^4.0.0-rc.12",
@@ -25,8 +25,8 @@
     "css-loader": "^1.0.1",
     "raw-loader": "^3.1.0",
     "style-loader": "^0.23.1",
-    "webpack": "^4.43.0",
-    "webpack-cli": "^3.3.11",
-    "webpack-dev-server": "^3.10.3"
+    "webpack": "^5.82.1",
+    "webpack-cli": "^5.1.1",
+    "webpack-dev-server": "^4.15.0"
   }
 }

packages/react-devtools-shell/src/e2e-regression/devtools.js

@@ -46,7 +46,13 @@ function init(appIframe, devtoolsContainer, appSource) {
 const iframe = document.getElementById('iframe');
 const devtoolsContainer = document.getElementById('devtools');
 
-init(iframe, devtoolsContainer, 'dist/e2e-app-regression.js');
+const {protocol, hostname} = window.location;
+const port = 8181; // secondary webpack server port
+init(
+  iframe,
+  devtoolsContainer,
+  `${protocol}//${hostname}:${port}/dist/e2e-app-regression.js`,
+);
 
 // ReactDOM Test Selector APIs used by Playwright e2e tests
 window.parent.REACT_DOM_DEVTOOLS = ReactDOM;