closed property is an boolean type property, which is used to check whther the browser window has been closed or not.
<p>Click the below buttons to know the closed property testing result.</p> <input type="button" value="Click to open" onclick="testOpen()"/><br /> <input type="button" value="Click to close" onclick="testClose()"/><br /><br /> <input type="button" value="Click to check" onclick="testCheck()"/><br /> <p id="myId"></p> <script> var newWindow; function testOpen() { newWindow = window.open("", "newWindow", "height=250, width=500"); } function testClose() { if (newWindow) { newWindow.close(); } } function testCheck() { if (!newWindow) { document.getElementById("myId").innerHTML = "Window is not yet opened!"; } else { if (!newWindow.closed) { document.getElementById("myId").innerHTML = "Window is not closed."; } else { document.getElementById("myId").innerHTML = "Window is closed" } } } </script>
In the script code function testOpen() opens the new window of a browser, function testClose() closes the opened window of a browser, function testCheck() tests the working of closed property and returns the output.
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