From 40110c4a8c649678613a21d4e6762541d664f0af Mon Sep 17 00:00:00 2001
From: "s.v.zaytsev" <s.v.zaytsev@tinkoff.ru>
Date: Wed, 24 Sep 2025 12:48:40 +0500
Subject: [PATCH] feat(signals): add support all providedIn types from
 `Injectable` (#4963)

---
 modules/signals/src/signal-store.ts | 38 +++++++++++++++++------------
 1 file changed, 22 insertions(+), 16 deletions(-)

diff --git a/modules/signals/src/signal-store.ts b/modules/signals/src/signal-store.ts
index 720cd79df9..d274354414 100644
--- a/modules/signals/src/signal-store.ts
+++ b/modules/signals/src/signal-store.ts
@@ -9,7 +9,13 @@ import {
 } from './signal-store-models';
 import { OmitPrivate, Prettify } from './ts-helpers';
 
-type SignalStoreConfig = { providedIn?: 'root'; protectedState?: boolean };
+type ProvidedIn = {
+  providedIn?: 'root' | 'platform';
+};
+
+type SignalStoreConfig = ProvidedIn & {
+  protectedState?: boolean;
+};
 
 type SignalStoreMembers<FeatureResult extends SignalStoreFeatureResult> =
   Prettify<
@@ -440,7 +446,7 @@ export function signalStore<
 ): Type<SignalStoreMembers<R> & StateSource<Prettify<OmitPrivate<R['state']>>>>;
 
 export function signalStore<F1 extends SignalStoreFeatureResult>(
-  config: { providedIn?: 'root'; protectedState?: true },
+  config: ProvidedIn & { protectedState?: true },
   f1: SignalStoreFeature<EmptyFeatureResult, F1>
 ): Type<
   SignalStoreMembers<F1> & StateSource<Prettify<OmitPrivate<F1['state']>>>
@@ -450,7 +456,7 @@ export function signalStore<
   F2 extends SignalStoreFeatureResult,
   R extends SignalStoreFeatureResult = F1 & F2,
 >(
-  config: { providedIn?: 'root'; protectedState?: true },
+  config: ProvidedIn & { protectedState?: true },
   f1: SignalStoreFeature<EmptyFeatureResult, F1>,
   f2: SignalStoreFeature<{} & F1, F2>
 ): Type<SignalStoreMembers<R> & StateSource<Prettify<OmitPrivate<R['state']>>>>;
@@ -460,7 +466,7 @@ export function signalStore<
   F3 extends SignalStoreFeatureResult,
   R extends SignalStoreFeatureResult = F1 & F2 & F3,
 >(
-  config: { providedIn?: 'root'; protectedState?: true },
+  config: ProvidedIn & { protectedState?: true },
   f1: SignalStoreFeature<EmptyFeatureResult, F1>,
   f2: SignalStoreFeature<{} & F1, F2>,
   f3: SignalStoreFeature<F1 & F2, F3>
@@ -472,7 +478,7 @@ export function signalStore<
   F4 extends SignalStoreFeatureResult,
   R extends SignalStoreFeatureResult = F1 & F2 & F3 & F4,
 >(
-  config: { providedIn?: 'root'; protectedState?: true },
+  config: ProvidedIn & { protectedState?: true },
   f1: SignalStoreFeature<EmptyFeatureResult, F1>,
   f2: SignalStoreFeature<{} & F1, F2>,
   f3: SignalStoreFeature<F1 & F2, F3>,
@@ -486,7 +492,7 @@ export function signalStore<
   F5 extends SignalStoreFeatureResult,
   R extends SignalStoreFeatureResult = F1 & F2 & F3 & F4 & F5,
 >(
-  config: { providedIn?: 'root'; protectedState?: true },
+  config: ProvidedIn & { protectedState?: true },
   f1: SignalStoreFeature<EmptyFeatureResult, F1>,
   f2: SignalStoreFeature<{} & F1, F2>,
   f3: SignalStoreFeature<F1 & F2, F3>,
@@ -502,7 +508,7 @@ export function signalStore<
   F6 extends SignalStoreFeatureResult,
   R extends SignalStoreFeatureResult = F1 & F2 & F3 & F4 & F5 & F6,
 >(
-  config: { providedIn?: 'root'; protectedState?: true },
+  config: ProvidedIn & { protectedState?: true },
   f1: SignalStoreFeature<EmptyFeatureResult, F1>,
   f2: SignalStoreFeature<{} & F1, F2>,
   f3: SignalStoreFeature<F1 & F2, F3>,
@@ -520,7 +526,7 @@ export function signalStore<
   F7 extends SignalStoreFeatureResult,
   R extends SignalStoreFeatureResult = F1 & F2 & F3 & F4 & F5 & F6 & F7,
 >(
-  config: { providedIn?: 'root'; protectedState?: true },
+  config: ProvidedIn & { protectedState?: true },
   f1: SignalStoreFeature<EmptyFeatureResult, F1>,
   f2: SignalStoreFeature<{} & F1, F2>,
   f3: SignalStoreFeature<F1 & F2, F3>,
@@ -540,7 +546,7 @@ export function signalStore<
   F8 extends SignalStoreFeatureResult,
   R extends SignalStoreFeatureResult = F1 & F2 & F3 & F4 & F5 & F6 & F7 & F8,
 >(
-  config: { providedIn?: 'root'; protectedState?: true },
+  config: ProvidedIn & { protectedState?: true },
   f1: SignalStoreFeature<EmptyFeatureResult, F1>,
   f2: SignalStoreFeature<{} & F1, F2>,
   f3: SignalStoreFeature<F1 & F2, F3>,
@@ -570,7 +576,7 @@ export function signalStore<
     F8 &
     F9,
 >(
-  config: { providedIn?: 'root'; protectedState?: true },
+  config: ProvidedIn & { protectedState?: true },
   f1: SignalStoreFeature<EmptyFeatureResult, F1>,
   f2: SignalStoreFeature<{} & F1, F2>,
   f3: SignalStoreFeature<F1 & F2, F3>,
@@ -603,7 +609,7 @@ export function signalStore<
     F9 &
     F10,
 >(
-  config: { providedIn?: 'root'; protectedState?: true },
+  config: ProvidedIn & { protectedState?: true },
   f1: SignalStoreFeature<EmptyFeatureResult, F1>,
   f2: SignalStoreFeature<{} & F1, F2>,
   f3: SignalStoreFeature<F1 & F2, F3>,
@@ -639,7 +645,7 @@ export function signalStore<
     F10 &
     F11,
 >(
-  config: { providedIn?: 'root'; protectedState?: true },
+  config: ProvidedIn & { protectedState?: true },
   f1: SignalStoreFeature<EmptyFeatureResult, F1>,
   f2: SignalStoreFeature<{} & F1, F2>,
   f3: SignalStoreFeature<F1 & F2, F3>,
@@ -678,7 +684,7 @@ export function signalStore<
     F11 &
     F12,
 >(
-  config: { providedIn?: 'root'; protectedState?: true },
+  config: ProvidedIn & { protectedState?: true },
   f1: SignalStoreFeature<EmptyFeatureResult, F1>,
   f2: SignalStoreFeature<{} & F1, F2>,
   f3: SignalStoreFeature<F1 & F2, F3>,
@@ -726,7 +732,7 @@ export function signalStore<
     F12 &
     F13,
 >(
-  config: { providedIn?: 'root'; protectedState?: true },
+  config: ProvidedIn & { protectedState?: true },
   f1: SignalStoreFeature<EmptyFeatureResult, F1>,
   f2: SignalStoreFeature<{} & F1, F2>,
   f3: SignalStoreFeature<F1 & F2, F3>,
@@ -780,7 +786,7 @@ export function signalStore<
     F13 &
     F14,
 >(
-  config: { providedIn?: 'root'; protectedState?: true },
+  config: ProvidedIn & { protectedState?: true },
   f1: SignalStoreFeature<EmptyFeatureResult, F1>,
   f2: SignalStoreFeature<{} & F1, F2>,
   f3: SignalStoreFeature<F1 & F2, F3>,
@@ -840,7 +846,7 @@ export function signalStore<
     F14 &
     F15,
 >(
-  config: { providedIn?: 'root'; protectedState?: true },
+  config: ProvidedIn & { protectedState?: true },
   f1: SignalStoreFeature<EmptyFeatureResult, F1>,
   f2: SignalStoreFeature<{} & F1, F2>,
   f3: SignalStoreFeature<F1 & F2, F3>,