Add Object.is blog

blog_posts/javascript-object-is-triple-equals.md

@@ -0,0 +1,30 @@
+---
+title: What's the difference between Object.is() and the triple equals operator in JavaScript?
+type: question
+tags: javascript,object,type
+authors: chalarangelo
+cover: blog_images/rocky-mountains.jpg
+excerpt: `Object.is()` and the triple equals operator (`===`) can both be used for equality checking in JavaScript, but when should you use each one?
+---
+
+If you want to check equality in JavaScript, there are two comparison operators, which are explained in depth in a previous [article](/blog/s/javascript-equality).
+
+Very briefly, the double equals operator (`==`) only compares value whereas the triple equals operator (`===`) compares both value and type. But there is also a third option, `Object.is()`, which behaves the same as the triple equals operator with the exception of `NaN` and `+0` and `-0`.
+
+Here are some examples for additional clarity:
+
+```js
+{} === {}; // false
+Object.is({}, {}); // false
+
+1 === 1; // false
+Object.is(1, 1); // false
+
++0 === -0; // true
+Object.is(+0, -0); // false
+
+NaN === NaN; // false
+Object.is(NaN, NaN); // true
+```
+
+**Image credit:** [Jonathan Sanchez](https://unsplash.com/@jonathansancheziam?utm_source=unsplash&utm_medium=referral&utm_content=creditCopyText) on [Unsplash](https://unsplash.com?utm_source=unsplash&utm_medium=referral&utm_content=creditCopyText)