From 1650c6efebc75fdc47b2ec082ba10c197b894aef Mon Sep 17 00:00:00 2001
From: Eduardo San Martin Morote <posva13@gmail.com>
Date: Tue, 18 Apr 2023 15:00:13 +0200
Subject: [PATCH] feat(types): improve setActivePinia types

---
 packages/pinia/src/rootStore.ts | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/packages/pinia/src/rootStore.ts b/packages/pinia/src/rootStore.ts
index 0509a5c8eb..cc212401a8 100644
--- a/packages/pinia/src/rootStore.ts
+++ b/packages/pinia/src/rootStore.ts
@@ -30,8 +30,14 @@ export let activePinia: Pinia | undefined
  *
  * @param pinia - Pinia instance
  */
-export const setActivePinia = (pinia: Pinia | undefined) =>
-  (activePinia = pinia)
+// @ts-expect-error: cannot constrain the type of the return
+export const setActivePinia: _SetActivePinia = (pinia) => (activePinia = pinia)
+
+interface _SetActivePinia {
+  (pinia: Pinia): Pinia
+  (pinia: undefined): undefined
+  (pinia: Pinia | undefined): Pinia | undefined
+}
 
 /**
  * Get the currently active pinia if there is any.