From 0d8477534f86f03cf4b05fa3cac3f01b2ff62fb4 Mon Sep 17 00:00:00 2001
From: Peng Xiao <pengxiao@outlook.com>
Date: Wed, 24 Aug 2022 17:34:55 +0800
Subject: [PATCH] fix: remove tln after unmount

---
 tldraw/packages/react/src/hooks/useSetup.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tldraw/packages/react/src/hooks/useSetup.ts b/tldraw/packages/react/src/hooks/useSetup.ts
index da43f89adf..01887418d8 100644
--- a/tldraw/packages/react/src/hooks/useSetup.ts
+++ b/tldraw/packages/react/src/hooks/useSetup.ts
@@ -2,7 +2,7 @@ import * as React from 'react'
 import type { TLAppPropsWithoutApp, TLAppPropsWithApp } from '~components'
 import type { TLReactShape, TLReactApp } from '~lib'
 
-declare const window: Window & { tln: TLReactApp<any> }
+declare const window: Window & { tln?: TLReactApp<any> }
 
 export function useSetup<
   S extends TLReactShape = TLReactShape,
@@ -31,6 +31,7 @@ export function useSetup<
     if (onMount) onMount(app, null)
     return () => {
       unsubs.forEach(unsub => unsub())
+      window['tln'] = undefined
     }
   }, [app])