I want to ajax the collected access information to the server when the web page is closed. Is it practical? ?
The approximate code structure is as follows:

window.onbeforeunload=function(e){    
    visit_end=new Date();
    visit_long=((visit_end.getTime()-visit_start.getTime())/1000).toFixed(1);
    //此处省略以上采集的访问信息

    ajax_visit_info(); //在关闭网页时，调用ajax函数发送到后台。
    //return confirm('你真的要关闭吗？');     //不想加上这个，看起来不友好。    
}

The question is, is it practical to use window.onbeforeunload to trigger ajax?
If the user's phone is stuck, or there is a problem with the network, will there be a high probability of missing the ajax trigger? ?

PS: I can test it with wamp.