Why Does JavaScript Do This!? #002

In JavaScript this

and this

are false...

Wait what? If both of those are false... then how can we tell if something is NaN? Well there's two ways.

The first is with the `Math.isNaN()` method. This one's kind of like a '==='. It's only going to return true if you literally pass it the 'NaN' value. If you pass in a string, boolean, or number it will return False.

The second is with just the isNaN() method. This one is a little looser and more like a '=='. This will coerce values and tell if you it is NaN or not. If you pass in the string 'hi', it will try to convert it to a number, realize that it's NaN, and return true.

See the full video here - https://youtube.com/shorts/JjxP1c1tj24?si=iHRKLMBq5WYMNT3G