No visible cause for “Unexpected token ILLEGAL”

Question

I\'m getting this JavaScript error on my console:

Uncaught SyntaxError: Unexpected token ILLEGAL

This is my code:

Answer 1

Here is my reason:

before:

var path = "D:\xxx\util.s"

which \u is a escape, I figured it out by using Codepen's analyze JS.

after:

var path = "D:\\xxx\\util.s"

and the error fixed