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<!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>
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