The use of the triple exclamation mark

Question

Looking through the source code of one of our projects, I\'ve found some amount of places where we\'re using three exclamation marks in conditional statements, like so:

Answer 1

In javascript, it's a way to show that what you are evaluating is not a boolean but a truthy or falshy.

So for truthy/falshy values you either use !! or !!! and for booleans ! or nothing.

This is simply for readability.