javascript - 如何修改我的代码以在所有类型的浏览器中执行？

Question

我想在用户关闭浏览器时显示带有个人消息的弹出窗口 我发现了很多类似的脚本，但它们在 Firefox 中工作，而不是在 Chrome 中工作， 有什么办法解决这个问题吗？

    window.onbeforeunload = function (event) {
    var message = 'Important: Please click on \'Save\' button to leave this page.';
    if (typeof event == 'undefined') {
        event = window.event;
    }
    if (event) {
        event.returnValue = message;
    }
    return message;
};

此外，我的代码中没有该消息，但我有另一条消息，如下所示:“Cette pagedemande de recognizer sa fermeture ; des données saisies pourraient ne pas être enregistrées”

Answer 1

根据https://developers.google.com/web/updates/2016/04/chrome-51-deprecations?hl=en#remove_custom_messages_in_onbeforeload_dialogs的信息

A window’s onbeforeunload property may be set to a function that returns a string that is shown to the user in a dialog box to confirm that the user wants to navigate away. This was intended to prevent users from losing data during navigation. Unfortunately, it is often used to scam users.

Starting in Chrome 51, a custom string will no longer be shown to the user. Chrome will still show a dialog to prevent users from losing data, but it's contents will be set by the browser instead of the web page.

With this change, Chrome will be consistent with Safari 9.1 and later, as well as Firefox 4 and later.

这意味着您无法在 onbeforeunload 事件中获取自定义消息。如果确实是提醒用户退出前保存，默认的浏览器消息基本上应该说相同的信息(并且将基于用户的浏览器语言)，因此您不需要手动实现此功能。