Permitted content #

Permitted attributes #

Descriptions for attributes specific to this element #

src = URI

The address of a page that the nested browsing context is to contain.

name = browsing-context name

A valid browsing context name.

width = non-negative integer

The width of the iframe, in CSS pixels.

height = non-negative integer

The height of the iframe, in CSS pixels.

sandbox = sandbox allow list NEW

Instructs the UA to enable a set of extra restrictions on any content hosted by the iframe.

seamless = "seamless" or "" (empty string) or empty NEW

Instructs the UA that the iframe element's browsing context is to be rendered in a manner that makes it appear to be part of the containing document (seamlessly included in the parent document).

Additional constraints and admonitions #

• The interactive element iframe must not appear as a descendant of the a element.
• The interactive element iframe must not appear as a descendant of the button element.
• The longdesc attribute on the iframe element is obsolete. Use a regular a element to link to the description.
• The align attribute on the iframe element is obsolete. Use CSS instead.
• The allowtransparency attribute on the iframe element is obsolete. Use CSS instead.
• The frameborder attribute on the iframe element is obsolete. Use CSS instead.
• The marginheight attribute on the iframe element is obsolete. Use CSS instead.
• The marginwidth attribute on the iframe element is obsolete. Use CSS instead.
• The scrolling attribute on the iframe element is obsolete. Use CSS instead.

Permitted parent elements #

any element that can contain phrasing elements

DOM interface #

interface HTMLIFrameElement : HTMLElement {
           attribute DOMString src;
           attribute DOMString srcdoc;
           attribute DOMString name;
  [PutForwards=value] readonly attribute DOMSettableTokenList sandbox;
           attribute boolean seamless;
           attribute DOMString width;
           attribute DOMString height;
  readonly attribute Document contentDocument;
  readonly attribute WindowProxy contentWindow;
};

Typical default display properties #