From 166a6f9f70474b2c98461264efa5a0dd7c7cea35 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Fri, 7 Aug 2020 15:41:55 +0300
Subject: [PATCH] Add isAsyncFunction

---
 snippets/isAsyncFunction.md | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 snippets/isAsyncFunction.md

diff --git a/snippets/isAsyncFunction.md b/snippets/isAsyncFunction.md
new file mode 100644
index 000000000..40bafd2ab
--- /dev/null
+++ b/snippets/isAsyncFunction.md
@@ -0,0 +1,18 @@
+---
+title: isAsyncFunction
+tags: type,function,intermediate
+---
+
+Checks if the given argument is an `async` function.
+
+Use `Object.prototype.toString()` and `Function.call()` and check if the result is `'[object AsyncFunction]'`.
+
+```js
+const isAsyncFunction = val =>
+  Object.prototype.toString.call(val) === '[object AsyncFunction]';
+```
+
+```js
+isAsyncFunction(function() {}); // false
+isAsyncFunction(async function() {}); // true
+```