Summary: HTMLMediaElement.allowedToPlay allows web authors to determine in advance of calling HTMLMediaElement.play() whether the HTMLMediaElement in its current state would be allowed to play, or would be blocked by the browser's autoplay blocking policies.
This is useful to web authors as if they can't autoplay they may prefer to download a poster image instead of paying the price of downloading media data. This feature is particularly useful for Firefox, as web authors can poll HTMLMediaElement.allowedToPlay to determine whether a permission prompt would show if they were to call play(). Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1478208 Spec: being developed here https://github.com/whatwg/html/issues/3617 Platform coverage: All Target release: The same release as block autoplay, so 63, or soon after. Preference: None Support in other engines: There is consensus in the WhatWG github issue, but no explicit commitments from other implementors yet. We decided we should push ahead with this for Firefox because of our strategy of prompting the user for permission makes this feature particularly useful for us, as this feature provides a way for sites to avoid the prompt if desired. Secure Context: No. HTMLMediaElement is already shipping elsewhere outside a secure context. _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
