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<!doctype html>
<title>VTTRegion.id</title>
<link rel="help" href="https://w3c.github.io/webvtt/#dom-vttregion-id">
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<div id=log></div>
<script>
test(function() {
var region = new VTTRegion();
assert_true('id' in region, 'id is not supported');
assert_equals(region.id, '', 'initial value');
region.id = '1';
assert_equals(region.id, '1', 'value after setting to "1"');
region.id = '';
assert_equals(region.id, '', 'value after setting to the empty string');
}, document.title + ' script-created region');
</script>
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