feat(CRA-start): bump webpack-dev-server to 4.0.0

packages/react-scripts/config/webpackDevServer.config.js

@@ -101,27 +101,27 @@ module.exports = function (proxy, allowedHost) {
     },
     // `proxy` is run between `before` and `after` `webpack-dev-server` hooks
     proxy,
-    onBeforeSetupMiddleware(app, server) {
+    onBeforeSetupMiddleware(devServer) {
       // Keep `evalSourceMapMiddleware`
       // middlewares before `redirectServedPath` otherwise will not have any effect
       // This lets us fetch source contents from webpack for the error overlay
-      app.use(evalSourceMapMiddleware(server));
+      devServer.app.use(evalSourceMapMiddleware(devServer));
 
       if (fs.existsSync(paths.proxySetup)) {
         // This registers user provided middleware for proxy reasons
-        require(paths.proxySetup)(app);
+        require(paths.proxySetup)(devServer.app);
       }
     },
-    onAfterSetupMiddleware(app) {
+    onAfterSetupMiddleware(devServer) {
       // Redirect to `PUBLIC_URL` or `homepage` from `package.json` if url not match
-      app.use(redirectServedPath(paths.publicUrlOrPath));
+      devServer.app.use(redirectServedPath(paths.publicUrlOrPath));
 
       // This service worker file is effectively a 'no-op' that will reset any
       // previous service worker registered for the same host:port combination.
       // We do this in development to avoid hitting the production cache if
       // it used the same host and port.
       // https://github.com/facebook/create-react-app/issues/2272#issuecomment-302832432
-      app.use(noopServiceWorkerMiddleware(paths.publicUrlOrPath));
+      devServer.app.use(noopServiceWorkerMiddleware(paths.publicUrlOrPath));
     },
   };
 };

packages/react-scripts/package.json

@@ -84,7 +84,7 @@
     "stylelint-webpack-plugin": "^3.0.1",
     "webpack": "5.50.0",
     "webpack-bundle-analyzer": "^4.4.2",
-    "webpack-dev-server": "4.0.0-rc.0",
+    "webpack-dev-server": "4.0.0",
     "webpack-manifest-plugin": "4.0.2",
     "workbox-webpack-plugin": "6.2.4"
   },

packages/react-scripts/scripts/start.js

@@ -124,16 +124,14 @@ checkBrowsers(paths.appPath, isInteractive)
       paths.publicUrlOrPath
     );
     // Serve webpack assets generated by the compiler over a web server.
-    const serverConfig = createDevServerConfig(
-      proxyConfig,
-      urls.lanUrlForConfig
-    );
-    const devServer = new WebpackDevServer(compiler, serverConfig);
+    const serverConfig = {
+      ...createDevServerConfig(proxyConfig, urls.lanUrlForConfig),
+      host: HOST,
+      port,
+    };
+    const devServer = new WebpackDevServer(serverConfig, compiler);
     // Launch WebpackDevServer.
-    devServer.listen(port, HOST, err => {
-      if (err) {
-        return console.log(err);
-      }
+    devServer.startCallback(() => {
       if (isInteractive) {
         clearConsole();
       }