From d24454038490e17126b18cbf43dbe707f05a7142 Mon Sep 17 00:00:00 2001
From: Ignatius Bagus <ignatius.mbs@gmail.com>
Date: Tue, 4 May 2021 09:06:46 +0700
Subject: [PATCH] set writable value to optional

---
 src/runtime/store/index.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/runtime/store/index.ts b/src/runtime/store/index.ts
index cf15db5250..985f8c792d 100644
--- a/src/runtime/store/index.ts
+++ b/src/runtime/store/index.ts
@@ -61,7 +61,7 @@ export function readable<T>(value: T, start: StartStopNotifier<T>): Readable<T>
  * @param {*=}value initial value
  * @param {StartStopNotifier=}start start and stop notifications for subscriptions
  */
-export function writable<T>(value: T, start: StartStopNotifier<T> = noop): Writable<T> {
+export function writable<T>(value?: T, start: StartStopNotifier<T> = noop): Writable<T> {
 	let stop: Unsubscriber;
 	const subscribers: Array<SubscribeInvalidateTuple<T>> = [];