This document opts in to responsive sizing with a
<meta name="responsive-embedded-sizing"> tag. The browser
measures it on load. After that, it only resizes if the document calls
window.requestResize().
The embedding page sets frame-sizing: content-height on the
iframe, so the browser sizes the iframe to the height of this document, with
no scrollbars or postMessage code.
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante venenatis dapibus posuere velit aliquet. Donec ullamcorper nulla non metus auctor fringilla.
Cras mattis consectetur purus sit amet fermentum. Maecenas sed diam eget risus varius blandit sit amet non magna. Vestibulum id ligula porta felis euismod semper. Nullam quis risus eget urna mollis ornare vel eu leo.
Aenean lacinia bibendum nulla sed consectetur. Curabitur blandit tempus porttitor. Etiam porta sem malesuada magna mollis euismod.
Details elements can be nested.
Fusce dapibus, tellus ac cursus commodo, tortor mauris condimentum nibh, ut fermentum massa justo sit amet risus.