gecko-dev/dom/base/test/test_getElementById.html

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HTML

<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=933193
-->
<head>
<meta charset="utf-8">
<title>Test for Bug 933193</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=933193">Mozilla Bug 933193</a>
<p id="display"></p>
<div id="content" style="display: none">
</div>
<pre id="test">
</pre>
<script type="application/javascript">
/** Test for Bug 933193 **/
var kid = document.createElement("span");
kid.id = "test";
var svg = document.createElementNS("http://www.w3.org/2000/svg", "svg");
svg.appendChild(kid);
is(svg.getElementById("test"), kid,
"Should find the right node when not in the DOM");
var newKid = document.createElement("span");
newKid.id = "test";
var newKidParent = document.createElement("span");
newKidParent.appendChild(newKid);
svg.insertBefore(newKidParent, kid);
is(svg.getElementById("test"), newKid,
"Should find the first right node when not in the DOM");
newKid.remove();
is(svg.getElementById("test"), kid,
"Should find the right node again when not in the DOM");
document.body.appendChild(svg);
is(svg.getElementById("test"), kid,
"Should find the right node when in the DOM");
is(document.getElementById("test").localName, "pre",
"document.getElementById should find the first element in the " +
"document with that id");
var frag = document.createDocumentFragment();
is(frag.getElementById("test"), null, "Shouldn't find what does not exist");
frag.appendChild(kid);
is(frag.getElementById("test"), kid,
"Should find the right node in the document fragment");
is(svg.getElementById("test"), null,
"Shouldn't find the kid since it's gone now");
</script>
</body>
</html>