Source code

Revision control

Other Tools

Test Info:

<!DOCTYPE html>
<title>Test for Bug 812687: focus order of reordered flex items</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script src="/tests/SimpleTest/EventUtils.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
.container { display: flex; }
#focus1 { background: yellow; }
#focus2 { background: lightgray; }
#focus3 { background: orange; }
#focus4 { background: lightblue; }
#focus5 { background: pink; }
<a target="_blank" href="">Mozilla Bug 812687</a>
<p id="display">
<a href="#" id="beforeContainer">Link before container</a>
<!-- This flex container's children are reordered visually with the "order"
CSS property, but their focus order (when tabbing through them) should
match their DOM order. So, #focus1 should receive focus before the other
flex items, even though it isn't visually the first flex item. And so
on, up to #focus5, which is visually first (due to its negative "order"
value) but should be focused last (due to being last in the DOM). -->
<div class="container">
<a href="#" id="focus1">1</a>
<div><a href="#" id="focus2">2</a></div>
<div style="order: 100"><a href="#" id="focus3">3</a></div>
<div><a href="#" id="focus4">4</a></div>
<a href="#" id="focus5" style="order: -1">5</a>
<div id="content" style="display: none"></div>
<pre id="test">
<script class="testbody" type="text/javascript">
/** Test for Bug 812687 **/
const gExpectedFocusedIds = [
function doTest() {
// First, we focus something just before the flex container:
is(document.activeElement, document.getElementById('beforeContainer'),
"explicitly-focused link should gain focus");
// And then we advance focus across the focusable things in the flex container
// and check that we traverse them in the expected order:
for (let expectedId of gExpectedFocusedIds) {
is(document.activeElement, document.getElementById(expectedId),
"expecting element '#" + expectedId + "' to be focused");
// Before we start, we have to bump Mac to make its 'tab'-key focus behavior
// predicatble:
function begin() {
SpecialPowers.pushPrefEnv({ set: [[ "accessibility.tabfocus", 7 ]] }, doTest);