window.onbeforeunload, window.unload, window.beforeunload fu

Question

window.onbeforeunload = function (event) {            
    // I need to call an API here but the window is closing
    // before making that HTTP call
    parent.API.LMSFinish("").then(function () { })
};

是否有其他方法可以调用窗口。

您可以将下面的代码用于Firefox和IE：

var myEvent = window.attachEvent || window.addEventListener;
var chkevent = window.attachEvent ? 'onbeforeunload' : 'beforeunload'; /// make IE7, IE8 compitable
myEvent(chkevent, function(e) { // For >=IE7, Chrome, Firefox
    var confirmationMessage = 'Are you sure to leave the page?';
    (e || window.event).returnValue = confirmationMessage;
    return confirmationMessage;
});

更新：

如果您的呼叫是异步的，则窗口将被关闭，您的呼叫不会开火。您必须在这样的事件中进行同步调用：

$.ajax({
    type: 'POST',
    async: false,
    url: '/clientarea/utils/record-time',
    data: 'teid=' + teid + '&t=' + t
});