Function cssRemoveClass

test/lib/testHelper.js:2526–2531

(el, className)

    }

    function cssRemoveClass(el, className) {
        var classes = (' ' + el.className + ' ').replace(' ' + className + ' ', function () {
            return ' '; // Use a cb to String.prototype.replace to avoid `$` issue.
        });
        el.className = cssNormalizeClass(classes);
    }

    function cssNormalizeClass(classes) {
        return classes.replace(/^\s+|\s+$/g, '').replace(/\s+/g, ' ');