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<!DOCTYPE html>
<html>
<head>
<title>Custom elements: Range APIs should invoke constructor in tree order</title>
<meta name="author" title="Edgar Chen" href="mailto:echen@mozilla.com">
<link rel="help" href="https://html.spec.whatwg.org/multipage/scripting.html#concept-upgrade-an-element">
<link rel="help" href="https://dom.spec.whatwg.org/#concept-create-element">
<link rel="help" href="https://dom.spec.whatwg.org/#concept-range-extract">
<link rel="help" href="https://dom.spec.whatwg.org/#concept-range-clone">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
</head>
<body>
<div id="log"></div>
<c-e id="root">
<c-e id="root-0">
<c-e id="root-0-0">
<c-e id="root-0-0-0"></c-e>
<span id="start"></span>
</c-e>
</c-e>
<c-e id="root-1"></c-e>
<span id="end"></span>
</c-e>
<script>
var logs = [];
class CE extends HTMLElement {
constructor() {
super();
logs.push(this.id);
}
}
customElements.define('c-e', CE);
function getRange() {
const range = new Range();
range.setStart(document.getElementById('start'), 0);
range.setEnd(document.getElementById('end'), 0);
return range;
}
test(function () {
// Clear log for testing.
logs = [];
getRange().cloneContents();
assert_array_equals(logs, ['root-0', 'root-0-0', 'root-1']);
}, 'Range.cloneContents should invoke constructor in tree order');
test(function () {
// Clear log for testing.
logs = [];
getRange().extractContents();
assert_array_equals(logs, ['root-0', 'root-0-0']);
}, 'Range.extractContents should invoke constructor in tree order');
</script>
</body>
</html>
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