javascript - 子框架打开一个弹出窗口。如何检查该弹出窗口是否从父级打开？

Question

我有一个页面包含一个框架。在这个框架内，我可以打开一个弹出窗口。如何判断此弹出窗口是否从父页面打开？

Answer 1

if (window.opener && 
    window.opener.top === window.opener) {
    // this window was opened from a window that is it's own top (not an IFrame)
}