How to listen for child window closing?

JavascriptDom EventsCross Domain

Javascript Problem Overview

I am opening a child window for Facebook sharing this way:

window.open(sharingUrl,'','toolbar=0,status=0,width=626,height=436');

The window is automatically closed when a user clicks share or close...

Is there a way to add a listener to these events?

Javascript Solutions

Solution 1 - Javascript

If you store a reference to the child window when you call window.open(), then you can poll using setInterval() to see whether the window is still open using the window.closed property. The example below checks twice per second.

var child = window.open('http://google.com','','toolbar=0,status=0,width=626,height=436');
var timer = setInterval(checkChild, 500);

function checkChild() {
	if (child.closed) {
		alert("Child window closed");	
		clearInterval(timer);
	}
}

Note to others: If you are ever in a situation where you have control over the html in the child window, you could make use of the onbeforeunload event and alert the parent window.

Solution 2 - Javascript

For future references, I'd like to share another solution that doesn't require setInterval :

var child = window.open('http://google.com','','toolbar=0,status=0,width=626,height=436');
child.onunload = function(){ console.log('Child window closed'); };

Solution 3 - Javascript

This will work fine

   <html>
<head>
<title>Detecting browser close in IE</title>
<script type="text/javascript">

window.onbeforeunload = function(){ myUnloadEvent(); }
function myUnloadEvent() {
    alert ('You can have Ur Logic Here ,');
  
}

</script>
</head>
</script>
</head>
<body >
<h1>Close the Window now</h1>
</body>
</html>
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Attributions

All content for this solution is sourced from the original question on Stackoverflow.

The content on this page is licensed under the Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) license.

Content TypeOriginal AuthorOriginal Content on Stackoverflow
QuestionOleg TarasenkoView Question on Stackoverflow
Solution 1 - JavascriptjessegavinView Answer on Stackoverflow
Solution 2 - JavascriptOdubucView Answer on Stackoverflow
Solution 3 - JavascriptMaddyView Answer on Stackoverflow