How to use window object closed in JavaScript

In this article, I am going to explain about window object close property.
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Closed property in JavaScript window object

In JavaScript window closed property, determine whether a window is closed or not.

Syntax of closed property

window.closed

Browser support

The closed property is supported in all major browser.

Example of closed property

<!DOCTYPE html>

<html>

<head>

<script type="text/javascript">

    var MyWindow;

    function openWin() {

        MyWindow = window.open("", "", "width=200,height=100");

    }

    function closeWin() {

        if (MyWindow) {

            MyWindow.close();

        }

    }

    function checkWin() {

        if (!MyWindow) {

            document.getElementById("msg").innerHTML = "'MyWindow' has never been opened!";

        }

        else {

            if (MyWindow.closed) {

                document.getElementById("msg").innerHTML = "'MyWindow' has been closed!";

            }

            else {

                document.getElementById("msg").innerHTML = "'MyWindow' has not been closed!";

            }

        }

    }

</script>

</head>

<body>

<input type="button" value="Open 'MyWindow'" onclick="openWin()" />

<input type="button" value="Close 'MyWindow'" onclick="closeWin()" />

<br /><br />

<input type="button" value="Has 'MyWindow' been closed?" onclick="checkWin()" />

<br /><br />

<div id="msg"></div>

</body>
</html>


Output:

closed propety.jpg

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