window.closed Property Javascript DOM

window.closed Property Javascript DOM Share / Like

The closed property will return a Boolean value of true if the target window has been closed, and false it is open.

SYNTAX window.closed

To demonstrate how it works we will create a page that has a popup generator that will keep generating the popup window on a timed interval if the user happens to close it. This script is geared to check to see if a window has been closed before trying to reopen it by using the "closed" property to perform an evaluation before we execute some code.

Javascript CODE EXAMPLE

var URLString = "anyPage.html";
var popup = window.open(URLString);
function rePop(){
    if (popup.closed){
        popup = window.open(URLString);
    }
    setTimeout("rePop()",7000); // 7000 ms is equal to 7 sec
}
rePop();

If you are looking for a script that will do something when a user tries to close the main browser window instead, you can find that fully explained with an example here in video and script form:
Javascript Trap User for Unsaved Work Tutorial Textarea Check Before Leave

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