2.1.32 [HTML5:2014] Section 4.7.9 The track element

V0056: The five unsigned short values of HTMLTrackElement are not supported

The specification states:

 4.7.9 The track element
     ...
     interface HTMLTrackElement : HTMLElement {
         ...
         const unsigned short NONE = 0;
         const unsigned short LOADING = 1;
         const unsigned short LOADED = 2;
         const unsigned short ERROR = 3;
         readonly attribute unsigned short readyState;
         ...
     };

IE10 Mode, IE9 Mode, IE8 Mode, IE7 Mode, and IE5 (Quirks) Mode (All versions)

The five unsigned short values NONE, LOADING, LOADED, ERROR, and readyState are not supported.

V0055: The track element is not supported

The specification states:

 4.7.9 The track element
     ...
     interface HTMLTrackElement : HTMLElement {
         ...
     };

IE9 Mode, IE8 Mode, IE7 Mode, and IE5 (Quirks) Mode (All versions)

The track element is not supported.