From adc8835304bb7333120a24ade95c5e3b57644946 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Julien=20Valverd=C3=A9?= <julien.valverde@mailo.com>
Date: Mon, 20 Oct 2025 07:09:49 +0200
Subject: [PATCH] Add useOnMount

---
 packages/effect-fc/src/Component.ts | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/packages/effect-fc/src/Component.ts b/packages/effect-fc/src/Component.ts
index dd1524f..c216237 100644
--- a/packages/effect-fc/src/Component.ts
+++ b/packages/effect-fc/src/Component.ts
@@ -407,3 +407,15 @@ export const withRuntime: {
         props,
     )
 })
+
+export const useOnMount: {
+    <A, E, R>(
+        f: () => Effect.Effect<A, E, R>
+    ): Effect.Effect<A, E, R>
+} = Effect.fnUntraced(function* <A, E, R>(
+    f: () => Effect.Effect<A, E, R>
+) {
+    const runtime = yield* Effect.runtime()
+    // biome-ignore lint/correctness/useExhaustiveDependencies: only computed on mount
+    return yield* React.useMemo(() => Runtime.runSync(runtime)(Effect.cached(f())), [])
+})