gecko-dev/dom/html/test/test_bug417760.html

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HTML

<!DOCTYPE html>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=417760
-->
<head>
<title>cannot focus() img with tabindex="-1"</title>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
<style type="text/css">
img {
border: 5px solid white;
}
img:focus {
border: 5px solid black;
}
</style>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script type="text/javascript">
function checkFocus(aExpected, aTabIndex)
{
elemCurr = document.activeElement.getAttribute("id");
is(elemCurr, aExpected, "Element with tabIndex " + aTabIndex
+ " did not receive focus!");
}
function doTest()
{
// First, test img with tabindex = 0
document.getElementById("img-tabindex-0").focus();
checkFocus("img-tabindex-0", 0);
// now test the img with tabindex = -1
document.getElementById("img-tabindex-minus-1").focus();
checkFocus("img-tabindex-minus-1", -1);
// now test the img without tabindex, should NOT receive focus!
document.getElementById("img-no-tabindex").focus();
checkFocus("img-tabindex-minus-1", null);
SimpleTest.finish();
}
SimpleTest.waitForExplicitFinish();
addLoadEvent(doTest);
</script>
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=417760">Mozilla Bug 417760</a>
<p id="display"></p>
<div id="content" style="display: none"></div>
<pre id="test">
</pre>
<br>img tabindex="0":
<img id="img-tabindex-0"
src="file_bug417760.png"
alt="MoCo logo" tabindex="0"/>
<br>img tabindex="-1":
<img id="img-tabindex-minus-1"
src="file_bug417760.png"
alt="MoCo logo" tabindex="-1"/>
<br>img without tabindex:
<img id="img-no-tabindex"
src="file_bug417760.png"
alt="MoCo logo"/>
</body>
</html>