const mobileMenu=(()=>{let focusable
let firstFocusable
let lastFocusable
function keyHandler(event){event=event||window.event
if(document.documentElement.dataset.menuState!=='on')return false
const tabKey=9
const escKey=27
switch(event.keyCode){case tabKey:if(focusable.length===1){event.preventDefault()
break}
if(event.shiftKey){if(document.activeElement===firstFocusable){event.preventDefault()
lastFocusable.focus()}}else{if(document.activeElement===lastFocusable){event.preventDefault()
firstFocusable.focus()}}
break
case escKey:document.documentElement.dataset.menuState='off'
allowFocus('[data-menu]',false)
break
default:break}}
function clickHandler(event){if(event.target.closest('[data-menu-toggle]')){document.documentElement.dataset.menuState=document.documentElement.dataset.menuState==='on'?'off':'on'
if(document.documentElement.dataset.menuState==='on'){sessionStorage.setItem('scroll-position',document.documentElement.scrollTop)
document.documentElement.dataset.scrollDisabled='on'
allowFocus('[data-menu]',true)
trapFocus()}else{document.documentElement.dataset.scrollDisabled='off'
document.documentElement.scrollTop=sessionStorage.getItem('scroll-position')
allowFocus('[data-menu]',false)}}}
function allowFocus(selector,state){const container=document.querySelector(selector)
const focusable=container.querySelectorAll('button, [href], input, select, textarea')
focusable.forEach(el=>el.setAttribute('tabindex',state?'':'-1'))
container.classList.toggle('hidden')}
function trapFocus(){focusable=document.querySelector('[data-menu-container]').querySelectorAll('a[href]:not([tabindex="-1"]), area[href]:not([tabindex="-1"]), input:not([disabled]):not([tabindex="-1"]), select:not([disabled]):not([tabindex="-1"]), textarea:not([disabled]):not([tabindex="-1"]), button:not([disabled]):not([tabindex="-1"]), iframe:not([tabindex="-1"]), [tabindex]:not([tabindex="-1"]), [contentEditable=true]:not([tabindex="-1"])')
firstFocusable=focusable[0]
lastFocusable=focusable[focusable.length-1]}
document.addEventListener('click',clickHandler,false)
document.addEventListener('keydown',keyHandler,false)})()