如何知道何时在JavaScript中关闭弹出窗口

问题描述

此代码将在弹出窗口中打开go.com:

This code will open go.com in popup window:

<a href="javascript:void(0)" onClick="javascript:window.open('http://go.com','','status=yes,scrollbars=yes,toolbar=no,menubar=no,location=no ,width=300px,height=300px')">open</a>

，并且我想在主页中使用alert('closed!')，当弹出窗口关闭且我无法编辑使用onunload="alert('closed!')"的弹出页面时，因为弹出页面是外部页面，并且我无法更改代码，例如

and I want to use alert('closed!') in main page, when popup is closed and I can't edit popup page for use onunload="alert('closed!')", because the popup page is an external page and I can't change the code like

var mywindow = window.open('http://go.com') ...

谢谢.

推荐答案

如何打开包含包含外部页面内容的iframe的本地"窗口，而不是直接在窗口中加载该外部页面?这样，您仍然可以对实际窗口进行足够的控制，以知道何时关闭窗口.

How about instead of directly loading that external page in the window, you open up a "local" window with an iframe containing the external page content? That way you still have enough control over the actual window to be able to tell when it's closed.

某些缺点:地址栏不会显示他们正在浏览的URL，如果go.com具有某种框架破坏代码，它也可能会损坏.

Some drawbacks: the address bar will not show the URL they are browsing and it may also break if go.com has some sort of frame busting code.

一些示例代码:

function openIFrameInWindow(url) {
    var myWindow = window.open("");

    var iframe = document.createElement("iframe");
    iframe.src = url;

    myWindow.document.body.appendChild(iframe);

    myWindow.document.body.onbeforeunload = function () { alert("WINDOW CLOSED") };
}

<a href="javascript:void(0)" onClick="javascript:openIFrameInWindow('http://go.com')">open</a>

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