是否有任何跨浏览器的JavaScript/jQuery代码来检测浏览器或浏览器标签是否正在关闭，但不是由于链接被单击?
当前回答
onunload是Chrome的答案。根据caniuse它的交叉浏览器。但并非所有浏览器的反应都一样。
window.onunload = function(){
alert("The window is closing now!");
}
developer.mozilla.org
这些事件在窗口卸载其内容和资源时触发。
铬:
Onunload只在页面关闭时执行。它甚至不会在页面刷新和导航到另一个页面时执行。
Firefox v86.0版本:
它根本不会执行。页面刷新，导航离开，关闭浏览器标签，关闭浏览器，什么都没有。
其他回答
//Detect Browser or Tab Close Events
$(window).on('beforeunload',function(e) {
e = e || window.event;
var localStorageTime = localStorage.getItem('storagetime')
if(localStorageTime!=null && localStorageTime!=undefined){
var currentTime = new Date().getTime(),
timeDifference = currentTime - localStorageTime;
if(timeDifference<25){//Browser Closed
localStorage.removeItem('storagetime');
}else{//Browser Tab Closed
localStorage.setItem('storagetime',new Date().getTime());
}
}else{
localStorage.setItem('storagetime',new Date().getTime());
}
});
JSFiddle Link
嗨，大家好，我能够通过使用浏览器本地存储和时间戳实现“检测浏览器和选项卡关闭事件”点击。希望你们所有的问题都能通过这个解决方案得到解决。
在我最初的研究之后，我发现当我们关闭浏览器时，浏览器会一个接一个地关闭所有的选项卡来完全关闭浏览器。因此，我观察到关闭制表符之间的时间延迟非常小。所以我把这个时间延迟作为我的主要验证点，并能够实现浏览器和选项卡关闭事件检测。
我在Chrome浏览器版本76.0.3809.132上测试了它，发现可以工作
:)如果你觉得我的回答有帮助，请投票....
Sorry, I was not able to add a comment to one of existing answers, but in case you wanted to implement a kind of warning dialog, I just wanted to mention that any event handler function has an argument - event. In your case you can call event.preventDefault() to disallow leaving the page automatically, then issue your own dialog. I consider this a way better option than using standard ugly and insecure alert(). I personally implemented my own set of dialog boxes based on kendoWindow object (Telerik's Kendo UI, which is almost fully open-sourced, except of kendoGrid and kendoEditor). You can also use dialog boxes from jQuery UI. Please note though, that such things are asynchronous, and you will need to bind a handler to onclick event of every button, but this is all quite easy to implement.
然而，我同意缺少真正的关闭事件是很糟糕的:例如，如果你想在真正关闭的情况下才在后端重置会话状态，这是一个问题。
它可以用来提醒用户是否有数据未保存或类似的事情。当标签页关闭或浏览器关闭或网页刷新时，此方法有效。
除非用户没有与网页进行交互，否则它不会工作，这是一种对抗恶意网站.....的机制除非你至少在网站窗口上点击或触摸，否则不会弹出窗口。
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<form>
<textarea placeholder = "Write...."></textarea>
</form>
<script type="text/javascript">
window.addEventListener('beforeunload', function (e) {
e.returnValue = '';
});
</script>
</body>
</html>
I have tried all above solutions, none of them really worked for me, specially because there are some Telerik components in my project which have 'Close' button for popup windows, and it calls 'beforeunload' event. Also, button selector does not work properly when you have Telerik grid in your page (I mean buttons inside the grid) So, I couldn't use any of above suggestions. Finally this is the solution worked for me. I have added an onUnload event on the body tag of _Layout.cshtml. Something like this:
<body onUnload="LogOff()">
然后添加LogOff函数重定向到Account/LogOff，这是Asp中的内置方法。净MVC。现在，当我关闭浏览器或选项卡，它重定向到LogOff方法和用户必须登录时返回。我已经在Chrome和Firefox中进行了测试。它确实有效!
function LogOff() {
$.ajax({
url: "/Account/LogOff",
success: function (result) {
}
});
}
<body onbeforeunload="ConfirmClose()" onunload="HandleOnClose()">
var myclose = false;
function ConfirmClose()
{
if (event.clientY < 0)
{
event.returnValue = 'You have closed the browser. Do you want to logout from your application?';
setTimeout('myclose=false',10);
myclose=true;
}
}
function HandleOnClose()
{
if (myclose==true)
{
//the url of your logout page which invalidate session on logout
location.replace('/contextpath/j_spring_security_logout') ;
}
}
//如果你正在关闭标签或只有一个标签的浏览器，这在IE7中是有效的
