track-id.html - mozsearch

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This WPT test may be referenced by the following Test IDs:
- /html/semantics/embedded-content/media-elements/track/track-element/track-id.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>TextTrack "id" attribute</title>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<video>

    <track id="LoremIpsum" src="resources/captions-fast.vtt" default>

    <script>

    test(function() {

        var video = document.querySelector("video");

        var track = document.querySelector("track");

        var textTrack = track.track;

        // Test default attribute value.

        assert_equals(textTrack.id, "LoremIpsum");

        assert_equals(video.textTracks[0].id, "LoremIpsum");

        // Make sure we can look up tracks by id.

        assert_equals(video.textTracks.getTrackById("LoremIpsum"), textTrack);

        // Test that it's readonly.

        textTrack.id = "newvalue";

        assert_equals(textTrack.id, "LoremIpsum");

});

    </script>

</video>