modernizr/feature-detects/video.js

Modernizr is a JavaScript library that detects HTML5 and CSS3 features in the user’s browser.

/*!
{
  "name": "HTML5 Video",
  "property": "video",
  "caniuse": "video",
  "tags": ["html5", "video", "media"],
  "knownBugs": ["Without QuickTime, `Modernizr.video.h264` will be `undefined`; https://github.com/Modernizr/Modernizr/issues/546"],
  "polyfills": [
    "html5media",
    "mediaelementjs",
    "sublimevideo",
    "videojs",
    "leanbackplayer",
    "videoforeverybody"
  ]
}
!*/
/* DOC
Detects support for the video element, as well as testing what types of content it supports.

Subproperties are provided to describe support for `ogg`, `h264`, `h265`, `webm`, `vp9`, `hls` and `av1` formats, e.g.:

```javascript
Modernizr.video         // true
Modernizr.video.ogg     // 'probably'
```
*/
define(['Modernizr', 'createElement'], function(Modernizr, createElement) {
  // Codec values from : github.com/NielsLeenheer/html5test/blob/9106a8/index.html#L845
  //                     thx to NielsLeenheer and zcorpan

  // Note: in some older browsers, "no" was a return value instead of empty string.
  //   It was live in FF3.5.0 and 3.5.1, but fixed in 3.5.2
  //   It was also live in Safari 4.0.0 - 4.0.4, but fixed in 4.0.5
  (function() {
    var elem = createElement('video');

    Modernizr.addTest('video', function() {
      var bool = false;
      try {
        bool = !!elem.canPlayType;
        if (bool) {
          bool = new Boolean(bool);
        }
      } catch (e) {}

      return bool;
    });

    // IE9 Running on Windows Server SKU can cause an exception to be thrown, bug #224
    try {
      if (!!elem.canPlayType) {
        Modernizr.addTest('video.ogg', elem.canPlayType('video/ogg; codecs="theora"').replace(/^no$/, ''));

        // Without QuickTime, this value will be `undefined`. github.com/Modernizr/Modernizr/issues/546
        Modernizr.addTest('video.h264', elem.canPlayType('video/mp4; codecs="avc1.42E01E"').replace(/^no$/, ''));
        Modernizr.addTest('video.h265', elem.canPlayType('video/mp4; codecs="hev1"').replace(/^no$/, ''));
        Modernizr.addTest('video.webm', elem.canPlayType('video/webm; codecs="vp8, vorbis"').replace(/^no$/, ''));
        Modernizr.addTest('video.vp9', elem.canPlayType('video/webm; codecs="vp9"').replace(/^no$/, ''));
        Modernizr.addTest('video.hls', elem.canPlayType('application/x-mpegURL; codecs="avc1.42E01E"').replace(/^no$/, ''));
        Modernizr.addTest('video.av1', elem.canPlayType('video/mp4; codecs="av01"').replace(/^no$/, ''));
      }
    } catch (e) {}
  })();
});