Function toggleClass

testing/qunit-2.9.2.js:4625–4631

(elem, name, force)

  	}

  	function toggleClass(elem, name, force) {
  		if (force || typeof force === "undefined" && !hasClass(elem, name)) {
  			addClass(elem, name);
  		} else {
  			removeClass(elem, name);
  		}
  	}

  	function removeClass(elem, name) {
  		var set = " " + elem.className + " ";