fix(@angular-devkit/build-angular): avoid extra tick in SSR builds

alan-agius4 · alan-agius4 · commit 9749ec687800 · 2025-09-09T18:32:42.000+02:00
In SSR applications, an unnecessary event loop tick during server startup could lead to an incorrect platform being initialized.

This change introduces an `ngJitMode` define, which is set to `false` during AOT builds. This allows for the JIT-specific code paths to not be followed, preventing the async operations that caused the extra tick. This ensures that the server platform is correctly and synchronously initialized.
diff --git a/packages/angular_devkit/build_angular/src/builders/server/index.ts b/packages/angular_devkit/build_angular/src/builders/server/index.ts
@@ -219,6 +219,7 @@ async function initialize(
           {
             plugins: [
               new webpack.DefinePlugin({
+                'ngJitMode': false,
                 'ngServerMode': true,
               }),
             ],

Original file line number	Diff line number	Diff line change
`@@ -219,6 +219,7 @@ async function initialize(`
`219`	`219`	`{`
`220`	`220`	`plugins: [`
`221`	`221`	`new webpack.DefinePlugin({`
	`222`	`+ 'ngJitMode': false,`
`222`	`223`	`'ngServerMode': true,`
`223`	`224`	`}),`
`224`	`225`	`],`