[JS] mutationObserver nice

const target = document.querySelector('.search-box'),
	MutationObserver = window.MutationObserver || window.WebKitMutationObserver,
	searchBoxObserver = new MutationObserver(mutationHandler),
	config = { attributes: true, attributeOldValue: true, attributeFilter: ['class'] };

function mutationHandler (mutations) {
	mutations.forEach(function () {
		$('#search-dropdown').val('');
	});
}

searchBoxObserver.observe(target, config);