jQuery(document).ready(function($){$('.main-navigation').on('keydown',function(e){if($('.main-navigation').hasClass('toggled')){var focusableEls=$(' .main-navigation .menu-toggle, .main-navigation a[href]:not([disabled]), .main-navigation li');var firstFocusableEl=focusableEls[0];var lastFocusableEl=focusableEls[focusableEls.length-1];var KEYCODE_TAB=9;if(e.key==='Tab'||e.keyCode===KEYCODE_TAB){if(e.shiftKey){if(document.activeElement===firstFocusableEl){lastFocusableEl.focus();e.preventDefault()}}else{if(document.activeElement===lastFocusableEl){firstFocusableEl.focus();e.preventDefault()}}}}})})