防止在刷新/F5中发生OnBeforeUnload()事件 [英] prevent OnBeforeUnload() event from happening in refresh/F5

问题描述

我正在使用onbeforeunload事件在关闭页面期间执行操作.
我不希望事件在Refresh/ F5 的情况下发生.

有没有办法做到这一点?

解决方案

不幸的是，onbeforeunload事件在浏览器中侦听页面状态.转到另一个页面以及刷新将更改页面状态，这意味着onbeforeunload仍将被触发.

所以我认为不可能只捕捉刷新.

但是，如果您通过JavaScript监听并阻止Keypress，则可以实现.

可以通过 F5 和 Ctrl R 键进行刷新，因此您的目标是防止这些操作.

使用jQuery .keydown()，您可以检测到以下键代码:

对于 Ctrl R

$(document).keydown(function (e) {
    if (e.keyCode == 65 && e.ctrlKey) {
        e.preventDefault();
    }
});

---

对于 F5

$(document).keydown(function (e) {
    if (e.which || e.keyCode) == 116) {
        e.preventDefault();
    }
});

I'm using onbeforeunload event to perform operations during the closing page.
I do not want the event to happen in the case of Refresh / F5.

Is there a way or other event to do this?

解决方案

Unfortunately onbeforeunload event listens the page state in the browser. Going to another page as well as refreshing will change the page state, meaning onbeforeunload will be triggered anyway.

So I think it is not possible to catch only refresh.

But, if you'll listen and prevent Keypress via JavaScript, then it can be achieved.

Refresh can be done via F5 and CtrlR keys, so your goal will be to prevent these actions.

using jQuery .keydown() you can detect these keycodes:

For CtrlR

$(document).keydown(function (e) {
    if (e.keyCode == 65 && e.ctrlKey) {
        e.preventDefault();
    }
});

---

For F5

$(document).keydown(function (e) {
    if (e.which || e.keyCode) == 116) {
        e.preventDefault();
    }
});

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