fix(@angular-devkit/build-angular): disable Vite prebundling when scr…

…ipt optimizations are enabled

This change ensures that `ngDevMode` is replaced in node packages, aligning the behavior of the Vite server more closely with a production environment.

(cherry picked from commit 29dd052)

packages/angular_devkit/build_angular/src/builders/dev-server/builder.ts

@@ -67,13 +67,6 @@ export function execute(
           );
         }
 
-        // Warn if the initial options provided by the user enable prebundling but caching is disabled
-        if (options.prebundle && !normalizedOptions.cacheOptions.enabled) {
-          context.logger.warn(
-            `Prebundling has been configured but will not be used because caching has been disabled.`,
-          );
-        }
-
         if (options.allowedHosts?.length) {
           context.logger.warn(
             `The "allowedHosts" option will not be used because it is not supported by the "${builderName}" builder.`,
@@ -188,7 +181,7 @@ case.
   };
 }
 
-function isEsbuildBased(
+export function isEsbuildBased(
   builderName: string,
 ): builderName is
   | '@angular/build:application'

packages/angular_devkit/build_angular/src/builders/dev-server/options.ts

@@ -9,6 +9,8 @@
 import { BuilderContext, targetFromTargetString } from '@angular-devkit/architect';
 import path from 'node:path';
 import { normalizeCacheOptions } from '../../utils/normalize-cache';
+import { normalizeOptimization } from '../../utils/normalize-optimization';
+import { isEsbuildBased } from './builder';
 import { Schema as DevServerOptions } from './schema';
 
 export type NormalizedDevServerOptions = Awaited<ReturnType<typeof normalizeOptions>>;
@@ -28,7 +30,7 @@ export async function normalizeOptions(
   projectName: string,
   options: DevServerOptions,
 ) {
-  const workspaceRoot = context.workspaceRoot;
+  const { workspaceRoot, logger } = context;
   const projectMetadata = await context.getProjectMetadata(projectName);
   const projectRoot = path.join(workspaceRoot, (projectMetadata.root as string | undefined) ?? '');
 
@@ -38,6 +40,27 @@ export async function normalizeOptions(
   const buildTargetSpecifier = options.buildTarget ?? options.browserTarget ?? `::development`;
   const buildTarget = targetFromTargetString(buildTargetSpecifier, projectName, 'build');
 
+  // Get the application builder options.
+  const browserBuilderName = await context.getBuilderNameForTarget(buildTarget);
+  const rawBuildOptions = await context.getTargetOptions(buildTarget);
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  const buildOptions = (await context.validateOptions(rawBuildOptions, browserBuilderName)) as any;
+  const optimization = normalizeOptimization(buildOptions.optimization);
+
+  if (options.prebundle !== false && isEsbuildBased(browserBuilderName)) {
+    if (!cacheOptions.enabled) {
+      // Warn if the initial options provided by the user enable prebundling but caching is disabled
+      logger.warn(
+        'Prebundling has been configured but will not be used because caching has been disabled.',
+      );
+    } else if (optimization.scripts) {
+      // Warn if the initial options provided by the user enable prebundling but script optimization is enabled.
+      logger.warn(
+        'Prebundling has been configured but will not be used because scripts optimization is enabled.',
+      );
+    }
+  }
+
   // Initial options to keep
   const {
     host,
@@ -86,6 +109,6 @@ export async function normalizeOptions(
     sslKey,
     forceEsbuild,
     // Prebundling defaults to true but requires caching to function
-    prebundle: cacheOptions.enabled && (prebundle ?? true),
+    prebundle: cacheOptions.enabled && !optimization.scripts && (prebundle ?? true),
   };
 }