What is causing the error `string.split is not a function`?

Change this...

var string = document.location;

to this...

var string = document.location + '';

This is because document.location is a Location object. The default .toString() returns the location in string form, so the concatenation will trigger that.

You could also use document.URL to get a string.

maybe

string = document.location.href;
arrayOfStrings = string.toString().split('/');

assuming you want the current url

run this

// you'll see that it prints Object
console.log(typeof document.location);

you want document.location.toString() or document.location.href

document.location isn't a string.

You're probably wanting to use document.location.href or document.location.pathname instead.

In clausule if, use (). For example:

stringtorray = "xxxx,yyyyy,zzzzz";
if (xxx && (stringtoarray.split(',') + "")) { ...