because the web page is a sports data web page, the page will be stuck when you hang a large amount of data in the background on the weekend, so please tell us how to monitor the page hanging in the background for more than a certain period of time and prompt the user to click to confirm and refresh the page?
(function(){
var ev = 'hidden' in document ? 'hidden' :
'webkitHidden' in document ? 'webkitHidden' :
'mozHidden' in document ? 'mozHidden' :
null;
var state = ev.replace(/hidden/i, 'visibilitychange'),d;
var pageChange = function(){
if (!document[ev]) {
(new Date().getTime()-d>5000)?(console.log('5s'),d = new Date().getTime()):(console.log('5s'));
document.title= "';
}else{
d = new Date().getTime();
document.title = "';
}
}
document.addEventListener(state, pageChange);
})();Previous: Img.onload does not execute