The srcdoc, sandbox, and seamless attributes are not supported by any browsers at this time. If you don’t want scrollbars on your iframes, you should continue to use the scrolling attribute. Using overflow to turn off scrolling is not reliable. The IFRAME element is supported by all modern browsers:. Scrolling - instead, use the CSS overflow property. Margin width - instead, use the CSS margin property. Margin height - instead, use the CSS margin property. Frame border - instead use the border CSS property. Allow transparency - instead, use the CSS background property to make the iframe transparent. Align - instead, use the CSS float property. Long desc - instead, use an A element to link to a description. 
seamless-tells the user agent that the iframe should be rendered like it is invisibly part of the parent document. Alternatively, embed is used to embed other types of content, including PDFs, browser plugins, and Flash animations. As mentioned, we use iframe to embed an HTML document onto a page. However, these two elements do slightly different things. sandbox-a list of features that should be allowed or disallowed in the frame window Like iframe, the embed element is used to embed an external resource in a web page. This attribute takes precedence over any URL in the src attribute srcdoc-the HTML for the source of the frame. src-the URL for the source of the frame. #Html iframe how to
Here is how to turn off scrolling with the scrolling attribute
Auto is the default and includes the scroll bars when they are needed and removes them when they are not. No says to remove all scroll bars whether needed or not. Yes tells the browser to always include scroll bars even if they aren’t needed. • To use the scrolling attribute, add it like any other attribute and then choose one of three values: yes, no, or auto. I’m also curious as to why you’re posting a question about
