Check if a single character is a whitespace?

Question

What is the best way to check if a single character is a whitespace?

I know how to check this through a regex.

But I am not sure if this is the best way if I onl

Answer 1

The regex approach is a solid way to go. But here's what I do when I'm lazy and forget the proper regex syntax:

str.trim() === '' ? alert('just whitespace') : alert('not whitespace');