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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>CSS Test (Selectors): Programmatic focus causes :focus-visible to match after keyboard usage when preventDefault() is used</title>
<link rel="author" title="Tyler Jones" href="tylerjdev@github.com" />
<link rel="help" href="https://drafts.csswg.org/selectors-4/#the-focus-visible-pseudo" />
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<style>
@supports not selector(:focus-visible) {
:focus {
outline: red solid 5px;
background-color: red;
}
}
:focus-visible {
outline: blue solid 5px;
}
:focus:not(:focus-visible) {
outline: 0;
background-color: lime;
}
</style>
</head>
<body>
This test checks that programmatically focusing an element after a click and using keyboard afterwards triggers <code>:focus-visible</code> matching.
<ol id="instructions">
<li>If the user-agent does not claim to support the <code>:focus-visible</code> pseudo-class then SKIP this test.</li>
<li>Click the button below that says "Click me".</li>
<li>Once focused on the button that says "I will be focused programmatically", use "Left" or "Right" arrow keys to navigate through the button group</li>
<li>If any button within the group has a blue outline after using either arrow key, then the test result is SUCCESS. If the element has a green background after using either arrow key, then the test result is FAILURE.</li>
</ol>
<br />
<button id="button">Click me</button>
<div id="container">
<button id="btn1">I will be focused programmatically.</button>
<button id="btn2">Button 2</button>
<button id="btn3">Button 3</button>
</div>
<script>
button.addEventListener("click", () => {
btn1.focus();
});
focusTrap(document.querySelector('#container'));
function focusTrap(container) {
container.addEventListener('keydown', (e) => {
if (e.key !== 'ArrowRight' && e.key !== 'ArrowLeft') return;
e.preventDefault();
const btns = container.querySelectorAll('button');
const currentIndex = Array.from(btns).indexOf(document.activeElement);
let nextIndex;
if (e.key === 'ArrowRight') {
nextIndex = (currentIndex + 1) % btns.length;
} else if (e.key === 'ArrowLeft') {
nextIndex = (currentIndex - 1 + btns.length) % btns.length;
}
btns[nextIndex].focus();
});
}
promise_test(async t => {
const arrow_right = "\uE014";
btn2.addEventListener("focus", t.step_func_done((e) => {
assert_equals(getComputedStyle(btn2).outlineColor, "rgb(0, 0, 255)", `outlineColor for ${btn2.tagName}#${btn2.id} is blue`);
assert_not_equals(getComputedStyle(btn2).backgroundColor, "rgb(0, 255, 0)", `backgroundColor for ${btn2.tagName}#${btn2.id} is NOT lime`);
}));
await test_driver.click(button);
assert_equals(document.activeElement, btn1);
await test_driver.send_keys(btn1, arrow_right);
}, "Programmatic focus after click and keyboard interaction should match :focus-visible");
</script>
</body>
</html>
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