javascript onbeforeunload 不显示自定义消息

Question

我有关于 onbeforeunload 事件的自定义消息并且运行良好，但我今天注意到它不再显示我的消息。相反，它显示“您所做的更改可能无法保存”

window.onbeforeunload = function () {

    return 'Custom message'
}

谁能告诉我如何解决它？

Answer 1

为了避免诈骗，chromium 和 chrome 决定取消在 onbeforeunload 对话框中设置自定义消息的功能。

查看此 bug report从 2016 年 2 月 18 日开始。

onbeforeunload dialogs are used for two things on the Modern Web:
1. Preventing users from inadvertently losing data.
2. Scamming users.

In an attempt to restrict their use for the latter while not stopping the former, we are going to not display the string provided by the webpage. Instead, we are going to use a generic string.

Firefox already does this[...]