What do +++ and --- mean in JavaScript?

javascript, jslint

Solution

There is no such operator. `+++` is parsed as `++ +`. Writing code with this in it is usually a bad idea.

Problem

My work is based on JSLint. I saw that JSLint is able to handle `+++` and `---` operator. I searched these operator on Internet but found nothing. What do these two operators mean in JavaScript?

Original source