Add, Remove, Toggle classname for an element in Vanilla Javascript

classname.js

Element.prototype.hasClass = function (name) {
	var classes = this.className.split(" "),
		hasClass = false;
	for (var i = 0; i < classes.length; i++) {
		if (classes[i] === name) {
			return true;
		}
	}
	return false;
};
Element.prototype.removeClass = function (name) {
	if (this.hasClass(name)) {
		this.className = this.className.replace(name, '');
		return true;
	} else {
		return false;
	}
};
Element.prototype.addClass = function (name) {
	if (!this.hasClass(name)) {
		this.className += ' ' + name;
		return true;
	} else {
		return false;
	}
};
Element.prototype.toggleClass = function (name) {
	if (this.hasClass(name)) {
		this.removeClass(name);
	} else {
		this.addClass(name);
	}
};