HTMLMediaElement.canPlayType()

The HTMLMediaElement method canPlayType() reports how likely it is that the current browser will be able to play media of a given MIME type.

Note: This feature is not available in Web Workers.

Syntax

canPlayResponse = audioOrVideo.canPlayType(mediaType);

A DOMString indicating how likely it is that the media can be played. The string will be one of the following values:

probably: Media of the type indicated by the mediaType parameter is probably playable on this device.
maybe: Not enough information is available to determine for sure whether or not the media will play until playback is actually attempted.
"" (empty string): Media of the given type definitely can't be played on the current device.

var obj = document.createElement('video');
console.log(obj.canPlayType('video/mp4')); // "maybe"

Specification
HTML Standard (HTML) # dom-navigator-canplaytype-dev

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
`canPlayType`	3	12	3.5 Before Firefox 28, `canPlayType()` returned `probably` when asked about WebM audio or video files without the `codecs` parameter. Since multiple codecs are supported, this is not enough information to determine if a file can be played, so `maybe` is now correctly returned.	9	≤12.1	4	≤37	18	4	≤12.1	3	1.0