Expected identifier – Internet Explorer Error

Whilst developing Windows Web Desktop (www.leapwing.co.uk/windows/), I came across an error, or rather an avoidable glitch in Internet Explorer with Javascript Identifiers – it’s to be expected really, tut tut Microsoft!

I didn’t as such get an error message but all my jQuery and javascript stopped working just in Internet Explorer. When I went into the error console, I noticed an error -

Expected identifier

The problem is caused if you have class as an identifier because Internet Explorer reserves the name class, which I did in the following code -

var class = $('#newWindow').attr('class');
var newClass = class + 1;

$('#newWindow').removeClass(class);
$('#newWindow').addClass(newClass);

To fix the error, just change your identifiers to something else (Just add a letter onto the end or something. (Remember to update all you references to the variable). I changed the code above to the following…

var classr = $('#newWindow').attr('class');
var newClass = classr + 1;

$('#newWindow').removeClass(classr);
$('#newWindow').addClass(newClass);

Hope that helped!