From dd6278b1d2021a38273d1e3ecf140cbd1350b9aa Mon Sep 17 00:00:00 2001
From: Arnoud de Vries <6420061+arnoud-dv@users.noreply.github.com>
Date: Thu, 23 Oct 2025 14:37:06 +0200
Subject: [PATCH] refactor(angular-query): make injectIsMutating signal
 read-only

---
 .changeset/inject-is-mutating-readonly.md                  | 5 +++++
 .../angular-query-experimental/src/inject-is-mutating.ts   | 4 ++--
 packages/angular-query-experimental/tsconfig.json          | 7 +++++++
 3 files changed, 14 insertions(+), 2 deletions(-)
 create mode 100644 .changeset/inject-is-mutating-readonly.md

diff --git a/.changeset/inject-is-mutating-readonly.md b/.changeset/inject-is-mutating-readonly.md
new file mode 100644
index 0000000000..ce43e97138
--- /dev/null
+++ b/.changeset/inject-is-mutating-readonly.md
@@ -0,0 +1,5 @@
+---
+'@tanstack/angular-query-experimental': patch
+---
+
+Make `injectIsMutating` signal read-only to prevent external modifications to the internal state
\ No newline at end of file
diff --git a/packages/angular-query-experimental/src/inject-is-mutating.ts b/packages/angular-query-experimental/src/inject-is-mutating.ts
index 8f11291b0e..7bab410634 100644
--- a/packages/angular-query-experimental/src/inject-is-mutating.ts
+++ b/packages/angular-query-experimental/src/inject-is-mutating.ts
@@ -25,7 +25,7 @@ export interface InjectIsMutatingOptions {
  * Can be used for app-wide loading indicators
  * @param filters - The filters to apply to the query.
  * @param options - Additional configuration
- * @returns signal with number of fetching mutations.
+ * @returns A read-only signal with the number of fetching mutations.
  */
 export function injectIsMutating(
   filters?: MutationFilters,
@@ -60,5 +60,5 @@ export function injectIsMutating(
 
   destroyRef.onDestroy(unsubscribe)
 
-  return result
+  return result.asReadonly()
 }
diff --git a/packages/angular-query-experimental/tsconfig.json b/packages/angular-query-experimental/tsconfig.json
index 1aea53d869..2aecb18545 100644
--- a/packages/angular-query-experimental/tsconfig.json
+++ b/packages/angular-query-experimental/tsconfig.json
@@ -7,6 +7,13 @@
     "useDefineForClassFields": false,
     "target": "ES2022"
   },
+  "angularCompilerOptions": {
+    "enableI18nLegacyMessageIdFormat": false,
+    "strictInjectionParameters": true,
+    "strictInputAccessModifiers": true,
+    "strictStandalone": true,
+    "strictTemplates": true
+  },
   "include": ["src", "scripts", "test-setup.ts", "*.config.*", "package.json"],
   "references": [{ "path": "../query-core" }, { "path": "../query-devtools" }]
 }