AO — headers listner

<script>


var headers = JSON.parse(localStorage.getItem('headers')) || [];

// push start, end time of headers
headers.push({'name': {{gtm.element}}.textContent, 'timeEnd': {{gtm.visibleLastTime}}, 'timeStart': {{gtm.visibleFirstTime}}})

localStorage.setItem('headers', JSON.stringify(headers))


</script>