HTML5: iframe – nested browsing context (inline frame)

iframe – nested browsing context (inline frame) # T

The iframe element introduces a new nested browsing context.

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 = integer.positive: The width of the iframe, in CSS pixels.
height = integer.positive: The height of the iframe, in CSS pixels.
sandbox = sandbox-allow-list: Instructs the UA to enable a set of extra restrictions on any content hosted by the iframe.
seamless = "seamless" | "": 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).

An iframe element must have both a start tag and an end tag.

iframe {

border: 2px inset; }