javascript - JavaScript 返回确认

Question

我在 Chrome 中遇到返回确认问题。在 Firefox 中没问题。

window.onbeforeunload = function() {
    var result = confirm('Really?');

    if(result) {
        console.log('Do something');
    }
}

有什么想法吗？谢谢!

Answer 1

您应该从 beforeunload 返回一些内容。

确认将被忽略

Since 25 May 2011, the HTML5 specification states that calls to window.showModalDialog(), window.alert(), window.confirm() and window.prompt() methods may be ignored during this event.

see MDN

window.onbeforeunload = function() {
    return 'Date will be lost: are you sure?'; //<= here
}

如果您不返回某些内容，则处理程序函数中的操作将在页面卸载之前执行。