Javascript in a nutshell:

Function in a teaching example for a framework, checks for validity of input, dev returns null instead of false when it isn't. In another place, uses !variable to check if variable is 0.

fucking follow the semantics of the code you write cunt why do you have to do this why is it so hard to write variable !== 0

I'm sorry, this really triggers me.

https://media.giphy.com/media/...