object是HTML5中一个简单的替代方案:

<对象数据= " https://github.com/AbrarJahin/Asp.NetCore_3.1-PostGRE_Role-Claim_Management/ " 宽度= " 400 " 身高= " 300 " type = " text / html " > 替换内容 < /对象>

你也可以尝试embed:

<嵌入src = " https://github.com/AbrarJahin/Asp.NetCore_3.1-PostGRE_Role-Claim_Management/ " 宽度= 200 身高= 200 onerror="alert('URL无效!!');"/>

Re-

目前，StackOverflow已经关闭了对显示外部URL内容的支持，运行代码片段不显示任何内容。但对于您的网站，它将完美地工作。

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。

你可以使用object和embed，像这样:

<object data="http://www.web-source.net" width="600" height="400">
    <embed src="http://www.web-source.net" width="600" height="400"> </embed>
    Error: Embedded data could not be displayed.
</object>

这并不新鲜，但仍然有效。但我不确定它是否具有相同的功能。

在自己网站的页面中加载另一个网站的页面的关键问题是安全性。这里定义了跨站点安全策略，如果另一个站点将其设置为严格的同源策略，则您将没有机会直接在iframe中加载它。因此，为了找到iframe的替代方案，它们必须能够绕过这个安全策略限制，即使在将来，如果WSC引入任何新组件，它也会有类似的安全限制。

目前，绕过这个问题的最好方法是在逻辑中模拟正常的页面访问，这意味着AJAX +服务器端访问可能是一个不错的选择。您可以在服务器端设置一些代理，获取页面内容并将其加载到iframe中。这是可行的，但不是完美的，因为如果在内容中有任何链接或图像，他们可能无法访问。

通常，如果您尝试在自己的iframe中加载一个页面，则需要检查该页面是否可以在iframe中加载。这篇文章给出了一些如何检查的指导方针。

基本上有4种方法将HTML嵌入到网页中:

<iframe> An iframe's content lives entirely in a separate context than your page. While that's mostly a great feature and it's the most compatible among browser versions, it creates additional challenges (shrink wrapping the size of the frame to its content is tough, insanely frustrating to script into/out of, nearly impossible to style). AJAX. As the solutions shown here prove, you can use the XMLHttpRequest object to retrieve data and inject it to your page. It is not ideal because it depends on scripting techniques, thus making the execution slower and more complex, among other drawbacks. Hacks. Few mentioned in this question and not very reliable. HTML5 Web Components. HTML Imports, part of the Web Components, allows to bundle HTML documents in other HTML documents. That includes HTML, CSS, JavaScript or anything else an .html file can contain. This makes it a great solution with many interesting use cases: split an app into bundled components that you can distribute as building blocks, better manage dependencies to avoid redundancy, code organization, etc. Here is a trivial example:

<！—其他来源的资源必须启用cors。--> <link rel="import" href="http://example.com/elements.html">

本地兼容性仍然是一个问题，但您可以使用polyfill使其在当前的常绿浏览器中工作。

你可以在这里和这里了解更多。

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。