From d95d4778955954b2246e506b1a910099ca8e3fcf Mon Sep 17 00:00:00 2001
From: Alan Agius <17563226+alan-agius4@users.noreply.github.com>
Date: Mon, 11 May 2026 08:52:46 +0000
Subject: [PATCH] fix(@angular/ssr): remove stateful flag from
 URL_PARAMETER_REGEXP

Removes the stateful `/g` flag from `URL_PARAMETER_REGEXP`. Previously, calling `.test()` on the global regular expression advanced its internal `lastIndex` property. This caused subsequent evaluations in the route extraction pipeline to silently fail to match, skipping `getPrerenderParams` for parameterized routes.

Closes #33154
---
 packages/angular/ssr/src/routes/ng-routes.ts | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/packages/angular/ssr/src/routes/ng-routes.ts b/packages/angular/ssr/src/routes/ng-routes.ts
index 438e8450d331..04f67c96d9d5 100644
--- a/packages/angular/ssr/src/routes/ng-routes.ts
+++ b/packages/angular/ssr/src/routes/ng-routes.ts
@@ -74,9 +74,14 @@ const MODULE_PRELOAD_MAX = 10;
 const CATCH_ALL_REGEXP = /\/(\*\*)$/;
 
 /**
- * Regular expression to match segments preceded by a colon in a string.
+ * Regular expression to match a segment preceded by a colon in a string.
  */
-const URL_PARAMETER_REGEXP = /(?<!\\):([^/]+)/g;
+const URL_PARAMETER_REGEXP = /(?<!\\):([^/]+)/;
+
+/**
+ * Regular expression to match all segments preceded by a colon in a string.
+ */
+const URL_PARAMETER_GLOBAL_REGEXP = new RegExp(URL_PARAMETER_REGEXP, 'g');
 
 /**
  * Additional metadata for a server configuration route tree.
@@ -464,7 +469,7 @@ async function* handleSSGRoute(
       for (const params of parameters) {
         const replacer = handlePrerenderParamsReplacement(params, currentRoutePath);
         const routeWithResolvedParams = currentRoutePath
-          .replace(URL_PARAMETER_REGEXP, replacer)
+          .replace(URL_PARAMETER_GLOBAL_REGEXP, replacer)
           .replace(CATCH_ALL_REGEXP, replacer);
 
         yield {