From 6549c734c4044c3142c16334a76f683e6d9162ef Mon Sep 17 00:00:00 2001
From: Jatin Panjwani <jatinpanjwani12@gmail.com>
Date: Fri, 11 Oct 2019 13:03:02 +0530
Subject: [PATCH] Implemented isNaN with test cases

---
 implementations/isNaN.js | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 implementations/isNaN.js

diff --git a/implementations/isNaN.js b/implementations/isNaN.js
new file mode 100644
index 0000000..e4d9ca9
--- /dev/null
+++ b/implementations/isNaN.js
@@ -0,0 +1,14 @@
+/**
+ * 
+  The isNaN() method checks if passed value is NaN
+
+  MDN Link: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isNaN
+ */
+
+Number.prototype.ownIsNaN = function ownIsNaN(value) {
+    let x = Number(value);
+    return x !== x;
+}
+
+// test cases 
+// {},'',null,undefined,' ',NaN,Infinity,true,false,'Infinity',[],new Date(),new Date().toString()
\ No newline at end of file