javascript: How Can a parent window know that its child window closed?

问题

I want to execute a function when an opened child window is closed. Child window opening code is:

outWin = window.open (pageURL, title, 'toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars=yes, resizable=no, copyhistory=no, width=600, height=400, top=100, left=100);

i want to call a javascript function written in parent window.I am using YUI-2 for developing the plugin. How can i make it work? what event should be registered?

thanks in advance.

回答1:

You could do something like this.

var intervalID, childWindow;

childWindow = window.open("http://www.google.com");

function checkWindow() {
    if (childWindow && childWindow.closed) {
        window.clearInterval(intervalID);
        alert('closed');
    }
}
var intervalID = window.setInterval(checkWindow, 500);

References: window.setInterval and this answer.

Simple example on jsfiddle.

回答2:

You can try acces the parent window by:

window.opener.functionThatYouWant();

This code is inside de child window.

But if you open an window that the URL is in another domain (not localhost), you can't access it because of security issues.

I used this code on Firefox, I am not sure if it works crossbrowser.

来源：https://stackoverflow.com/questions/5240428/javascript-how-can-a-parent-window-know-that-its-child-window-closed