为什么onbeforeunload（）执行当页面刷新时？ [英] Why onbeforeunload() executeing When Page get refreshed?
问题描述
大家好，
我已经为浏览器关闭编写了代码。关闭浏览器选项卡后，将删除所有会话。但是当我刷新所有会话正在删除的页面时，我遇到了一个问题。我的代码在下面
Hi Guys,
I have written code for browser closed. When Browser tab is closed all sessions will be removed. But I am facing a problem when I am refreshing the page all session are removing. My code is below
<script language="javascript" type="text/javascript">
var isClose = false;
//this code will handle the F5 or Ctrl+F5 key
//need to handle more cases like ctrl+R whose codes are not listed here
document.onkeydown = checkKeycode
function checkKeycode(e) {
var keycode;
if (window.event)
keycode = window.event.keyCode;
else if (e)
keycode = e.which;
if (keycode == 116) {
isClose = true;
}
}
function somefunction() {
isClose = true;
}
//并在身体标签中调用所有功能
< body>
请帮忙，为什么会这样？我希望清除关闭浏览器的会话不会在页面被推荐时。
感谢和问候
Amar
//and calling all function in body tag
<body >
Please help, Why is that happening? I want to clear session on browser closed Not when page get referesed.
Thank and regards
Amar
推荐答案
当发生以下任何一种情况时，beforeunload事件被明确记录为触发：
Thebeforeunloadevent is clearly documented as firing when any of the following happen:
- 关闭当前窗口。
- 通过输入新地址或选择收藏夹导航到其他位置。
- 单击引用其他文档的锚点。
- 调用
anchor.click方法。 - 调用
document.write方法。 - 调用
document.close方法。 - 调用
window.close方法。 - 调用
window.navigate或NavigateAndFind方法。 - 调用
location.replace方法。 - 调用
location.reload方法。 - 为
location.href属性指定新值。 - 通过
INPUT type = submit ACTION属性中指定的地址>控制，或调用form.submitm ethod。 - 调用
window.open方法，为窗口提供可能的值_self名称。 - 调用
document.open方法。 - 单击后退，前进，刷新或主页按钮。
- Close the current window.
- Navigate to another location by entering a new address or selecting a Favorite.
- Click an anchor that refers to another document.
- Invoke the
anchor.clickmethod. - Invoke the
document.writemethod. - Invoke the
document.closemethod. - Invoke the
window.closemethod. - Invoke the
window.navigateorNavigateAndFindmethod. - Invoke the
location.replacemethod. - Invoke the
location.reloadmethod. - Specify a new value for the
location.hrefproperty. - Submit a form to the address specified in the
ACTIONattribute via theINPUT type=submitcontrol, or invoke theform.submitmethod. - Invoke the
window.openmethod, providing the possible value_selffor the window name. - Invoke the
document.openmethod. - Click the Back, Forward, Refresh, or Home button.
beforeunload的工作方式，你无法区分天气，它是页面刷新或浏览器关闭。
The way beforeunload works, you can not differentiate weather it's a page refresh or a browser close.
当窗口，文档及其资源是即将被卸载。
The beforeunload event is fired when the window, the document and its resources are about to be unloaded.
https://developer.mozilla.org/en-US/docs/Web/Events/beforeunload [ ^ ]
但是，根据您的要求，您可以使用cookie或本地存储，以了解它是否是一个pa ge刷新或关闭。
在这里看到类似的讨论：
http://stackoverflow.com/questions/17026464/differentiate-browser-refresh-and-browser-close [ ^ ]
http://stackoverflow.com/questions/ 568977 /识别 - 刷新和关闭浏览器操作 [ ^ ]
https://developer.mozilla.org/en-US/docs/Web/Events/beforeunload[^]
However, for your requirement you could use a cookie or a local storage to know if it was a page refresh or close.
See similar dicussion here:
http://stackoverflow.com/questions/17026464/differentiate-browser-refresh-and-browser-close[^]
http://stackoverflow.com/questions/568977/identifying-between-refresh-and-close-browser-actions[^]
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