浏览器会阻塞对窗口的访问。顶部由于同源政策。IE漏洞也会发生。下面是工作代码:

function inIframe () {
    try {
        return window.self !== window.top;
    } catch (e) {
        return true;
    }
}

Top和self都是窗口对象(还有父窗口)，所以你会看到你的窗口是否是顶部窗口。

使用这个javascript函数作为如何实现这一点的例子。

function isNoIframeOrIframeInMyHost() {
// Validation: it must be loaded as the top page, or if it is loaded in an iframe 
// then it must be embedded in my own domain.
// Info: IF top.location.href is not accessible THEN it is embedded in an iframe 
// and the domains are different.
var myresult = true;
try {
    var tophref = top.location.href;
    var tophostname = top.location.hostname.toString();
    var myhref = location.href;
    if (tophref === myhref) {
        myresult = true;
    } else if (tophostname !== "www.yourdomain.com") {
        myresult = false;
    }
} catch (error) { 
  // error is a permission error that top.location.href is not accessible 
  // (which means parent domain <> iframe domain)!
    myresult = false;
}
return myresult;
}

我不确定这个例子如何适用于旧的Web浏览器，但我使用这个IE, Firefox和Chrome没有问题:

var iFrameDetection = (window === window.parent) ? false : true;

当在与父元素相同的iframe中，window. frameelement方法返回嵌入窗口的元素(例如iframe或object)。否则，如果在顶级上下文中浏览，或者如果父帧和子帧有不同的起源，它将求值为null。

window.frameElement
  ? 'embedded in iframe or object'
  : 'not embedded or cross-origin'

这是一个在所有现代浏览器中都具有基本支持的HTML标准。

if ( window !== window.parent ) 
{
      // The page is in an iframe   
} 
else 
{     
      // The page is not in an iframe   
}

function amiLoadedInIFrame() {
    try {
         // Introduce a new propery in window.top
         window.top.dummyAttribute = true;
         // If window.dummyAttribute is there.. then window and window.top are same intances
         return !window.dummyAttribute;
    } catch(e) {
         // Exception will be raised when the top is in different domain
         return true;
    }
}