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

alan-agius4 · alan-agius4 · commit 1a789087344a · 2025-09-09T16:32:44.000Z
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. (cherry picked from commit 9749ec6)
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`	`],`