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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);
    //此處省略以上采集的訪問信息

    ajax_visit_info(); //在關(guān)閉網(wǎng)頁時(shí)，調(diào)用ajax函數(shù)發(fā)送到后臺(tái)。
    //return confirm('你真的要關(guān)閉嗎？');     //不想加上這個(gè)，看起來不友好。    
}

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.