Контекст

function migg(aa){ var a = document.title; var title = ["\uD83D\uDCF0 "+a, " "+a]; i = 0; function new_title() {i = (i + 1) % title.length;jQuery(document).prop("title", title[i])} window.onload = function() { var a = document.title; jQuery(document).bind("visibilitychange", function() { document.hidden ? secinterval = setInterval(new_title, 500) : clearInterval(secinterval); jQuery(document).prop("title", document.hidden ? title[0] : a) });} }