Check if an element contains a class in JavaScript?

Question

Using plain JavaScript (not jQuery), Is there any way to check if an element contains a class?

Currently, I\'m doing this:

Answer 1

Here's a case-insensitive trivial solution:

function hasClass(element, classNameToTestFor) {
    var classNames = element.className.split(' ');
    for (var i = 0; i < classNames.length; i++) {
        if (classNames[i].toLowerCase() == classNameToTestFor.toLowerCase()) {
            return true;
        }
    }
    return false;
}