Feature Policy Demo: Fullscreen

This page

Cross-origin embedded content: uses allowfullscreen

<iframe allowfullscreen src="http://a.featurepolicy.rocks/fullscreen.html">

</iframe>

Cross-origin embedded content: uses allow="fullscreen"

<iframe allow="fullscreen" src="http://a.featurepolicy.rocks/fullscreen.html">

</iframe>

Cross-origin embedded content: no iframe attributes

<iframe src="http://a.featurepolicy.rocks/fullscreen.html">

</iframe>