Number.isNaN is not isNaN.

#javascript

Came across some interesting Tip for JavaScript developers.

#JavaScript tip for today:

Number.isNaN is not isNaN.

Wait, what?!

Yes, the global isNaN returns true for some unexpected values ({}, "hello", undefined), while Number.isNaN will only return true for the actual NaN. pic.twitter.com/b0CftzrIGB
— Tomek Sułkowski (@sulco ) October 2, 2019