不，没有等价物。<iframe>元素在HTML5中仍然有效。根据您需要的确切交互，可能会有不同的api。例如，postMessage方法允许你实现跨域javascript交互。但是如果你想要显示跨域的HTML内容(使用CSS样式并使用javascript进行交互)，iframe仍然是一个很好的方法。

如果你想这样做，并控制从基本页面或内容被服务的服务器，你可以使用跨源资源共享(http://www.w3.org/TR/access-control/)允许客户端JavaScript通过XMLHttpRequest()将数据加载到<div>:

// I safely ignore IE 6 and 5 (!) users
// because I do not wish to proliferate
// broken software that will hurt other
// users of the internet, which is what
// you're doing when you write anything
// for old version of IE (5/6)
xhr = new XMLHttpRequest();
xhr.onreadystatechange = function() {
  if(xhr.readyState == 4 && xhr.status == 200) {
    document.getElementById('displayDiv').innerHTML = xhr.responseText;
  }
};
xhr.open('GET', 'http://api.google.com/thing?request=data', true);
xhr.send();

现在，对于整个操作的关键，您需要为服务器编写代码，为客户端提供access - control - allow - origin标头，指定您希望客户端代码能够通过XMLHttpRequest()访问哪些域。下面是一个PHP代码的例子，你可以在你的页面顶部包含，以便将这些头发送给客户端:

<?php
  header('Access-Control-Allow-Origin: http://api.google.com');
  header('Access-Control-Allow-Origin: http://some.example.com');
?>

可以使用XMLHttpRequest将页面加载到div(或页面的任何其他元素)中。一个例子函数是:

function loadPage(){
if (window.XMLHttpRequest){
    // code for IE7+, Firefox, Chrome, Opera, Safari
    xmlhttp=new XMLHttpRequest();
}else{
    // code for IE6, IE5
    xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}

xmlhttp.onreadystatechange=function(){
    if (xmlhttp.readyState==4 && xmlhttp.status==200){
        document.getElementById("ID OF ELEMENT YOU WANT TO LOAD PAGE IN").innerHTML=xmlhttp.responseText;
    }
}

xmlhttp.open("POST","WEBPAGE YOU WANT TO LOAD",true);
xmlhttp.send();
}

如果您的服务器是有能力的，您也可以使用PHP来完成此工作，但由于您要求的是HTML5方法，因此这应该是您所需要的全部。

An iframe is still the best way to download cross-domain visual content. With AJAX you can certainly download the HTML from a web page and stick it in a div (as others have mentioned) however the bigger problem is security. With iframes you'll be able to load the cross domain content but won't be able to manipulate it since the content doesn't actually belong to you. On the other hand with AJAX you can certainly manipulate any content you are able to download but the other domain's server needs to be setup in such a way that will allow you to download it to begin with. A lot of times you won't have access to the other domain's configuration and even if you do, unless you do that kind of configuration all the time, it can be a headache. In which case the iframe can be the MUCH easier alternative.

正如其他人提到的，你也可以使用embed标签和object标签，但这并不一定比iframe更高级或更新。

HTML5更倾向于采用web api从跨域获取信息。通常web api只返回数据而不是HTML。

我创建了一个节点模块来解决这个问题node-iframe-replacement。您提供父站点的源URL和CSS选择器注入您的内容，它将两者合并在一起。

对父站点的更改每5分钟被检测一次。

var iframeReplacement = require('node-iframe-replacement');

// add iframe replacement to express as middleware (adds res.merge method) 
app.use(iframeReplacement);

// create a regular express route 
app.get('/', function(req, res){

    // respond to this request with our fake-news content embedded within the BBC News home page 
    res.merge('fake-news', {
        // external url to fetch 
       sourceUrl: 'http://www.bbc.co.uk/news',
       // css selector to inject our content into 
       sourcePlaceholder: 'div[data-entityid="container-top-stories#1"]',
       // pass a function here to intercept the source html prior to merging 
       transform: null
    });
});

该源代码包含一个向BBC新闻主页注入内容的工作示例。

这似乎也可以工作，尽管W3C指定它不是“用于外部(通常是非html)应用程序或交互式内容”。

<embed src="http://www.somesite.com" width=200 height=200 />

更多信息: http://www.w3.org/wiki/HTML/Elements/embed http://www.w3schools.com/tags/tag_embed.asp