From 15fc2a1155205a02ebadc0e3856213d455d6fb13 Mon Sep 17 00:00:00 2001
From: Jeppe Reinhold <jeppereinhold@gmail.com>
Date: Wed, 6 Mar 2019 19:29:06 +0100
Subject: [PATCH] FIX: Only invoke `destroy` if it exists

Fixes a bug, where it crashes if `destroy` isn't passed. Adheres to the TypeScript typings, where `destroy` is optional
---
 index.js | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/index.js b/index.js
index b008866..f25941a 100644
--- a/index.js
+++ b/index.js
@@ -4,7 +4,9 @@ module.exports.useAsyncEffect = (effect, destroy, inputs) => {
   useEffect(() => {
     let result;
     effect().then((value) => result = value);
-
-    return () => destroy(result);
+    
+    if(typeof destroy === 'function'){
+      return () => destroy(result);
+    }
   }, inputs);
 };