From 1ad87e28671f3c4698f90df8fa418283e2471401 Mon Sep 17 00:00:00 2001
From: Khaled Al-Ansari <khaledelansari@gmail.com>
Date: Thu, 5 Oct 2017 16:41:03 +0300
Subject: [PATCH] updating `is.boolean` method

According to [this comment](https://github.com/sindresorhus/is/pull/12#issuecomment-334327363) comparing variable to boolean values `true` and `false` manually is faster than using `typeof` so I'm changing the function for a faster results
---
 index.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/index.js b/index.js
index b3d52b9..1eb118d 100644
--- a/index.js
+++ b/index.js
@@ -61,7 +61,7 @@ is.undefined = isOfType('undefined');
 is.null = x => x === null;
 is.string = isOfType('string');
 is.number = isOfType('number');
-is.boolean = isOfType('boolean');
+is.boolean = (value) => value === true || value === false;
 is.symbol = isOfType('symbol');
 
 is.array = Array.isArray;