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<!DOCTYPE html>
<meta charset="utf-8" />
<title>Popover focus behaviors</title>
<link rel="author" href="mailto:masonf@chromium.org">
<link rel=help href="https://open-ui.org/components/popover.research.explainer">
<meta name="timeout" content="long">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-actions.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<script src="resources/popover-utils.js"></script>
<div popover data-test='default behavior - popover is not focused' data-no-focus>
<p>This is a popover</p>
<button tabindex="0">first button</button>
</div>
<div popover data-test='autofocus popover' autofocus tabindex=-1 class=should-be-focused>
<p>This is a popover</p>
</div>
<div popover data-test='autofocus empty popover' autofocus tabindex=-1 class=should-be-focused></div>
<div popover data-test='autofocus popover with button' autofocus tabindex=-1 class=should-be-focused>
<p>This is a popover</p>
<button tabindex="0">button</button>
</div>
<div popover data-test='autofocus child'>
<p>This is a popover</p>
<button autofocus class=should-be-focused tabindex="0">autofocus button</button>
</div>
<div popover data-test='autofocus on tabindex=0 element'>
<p autofocus tabindex=0 class=should-be-focused>This is a popover with autofocus on a tabindex=0 element</p>
<button tabindex="0">button</button>
</div>
<div popover data-test='autofocus multiple children'>
<p>This is a popover</p>
<button autofocus class=should-be-focused tabindex="0">autofocus button</button>
<button autofocus tabindex="0">second autofocus button</button>
</div>
<div popover autofocus tabindex=-1 data-test='autofocus popover and multiple autofocus children' class=should-be-focused>
<p>This is a popover</p>
<button autofocus tabindex="0">autofocus button</button>
<button autofocus tabindex="0">second autofocus button</button>
</div>
<dialog popover=auto data-test='Opening dialogs as popovers should use dialog initial focus algorithm.'>
<button class=should-be-focused>button</button>
</dialog>
<dialog popover=auto autofocus class=should-be-focused data-test='Opening dialogs as popovers which have autofocus should focus the dialog.'>
<button>button</button>
</dialog>
<style>
[popover] {
border: 2px solid black;
top:150px;
left:150px;
}
:focus-within { border: 5px dashed red; }
:focus { border: 5px solid lime; }
</style>
<script>
function addInvoker(t, popover) {
const button = document.createElement('button');
button.innerText = 'Click me';
const popoverId = 'popover-id';
assert_equals(document.querySelectorAll('#' + popoverId).length, 0);
document.body.appendChild(button);
t.add_cleanup(function() {
popover.removeAttribute('id');
button.remove();
});
popover.id = popoverId;
button.setAttribute('tabindex', '0');
button.setAttribute('popovertarget', popoverId);
return button;
}
function addPriorFocus(t) {
const priorFocus = document.createElement('button');
priorFocus.setAttribute("tabindex", "0");
priorFocus.id = 'priorFocus';
document.body.appendChild(priorFocus);
t.add_cleanup(() => priorFocus.remove());
return priorFocus;
}
function activateAndVerify(popover) {
const testName = popover.getAttribute('data-test');
promise_test(async t => {
const priorFocus = addPriorFocus(t);
let expectedFocusedElement = popover.matches('.should-be-focused') ? popover : popover.querySelector('.should-be-focused');
const changesFocus = !popover.hasAttribute('data-no-focus');
if (!changesFocus) {
expectedFocusedElement = priorFocus;
}
assert_true(!!expectedFocusedElement);
assert_false(popover.matches(':popover-open'));
// Directly show and hide the popover:
priorFocus.focus();
assert_equals(document.activeElement, priorFocus);
popover.showPopover();
assert_equals(document.activeElement, expectedFocusedElement, `${testName} activated by popover.showPopover()`);
popover.hidePopover();
assert_equals(document.activeElement, priorFocus, 'prior element should get focus on hide, or if focus didn\'t shift on show, focus should stay where it was');
assert_false(isElementVisible(popover));
// Manual popover does not restore focus
popover.popover = 'manual';
priorFocus.focus();
assert_equals(document.activeElement, priorFocus);
popover.showPopover();
assert_equals(document.activeElement, expectedFocusedElement, `${testName} activated by popover.showPopover()`);
popover.hidePopover();
if (!popover.hasAttribute('data-no-focus')) {
assert_not_equals(document.activeElement, priorFocus, 'prior element should *not* get focus when the popover is manual');
}
assert_false(isElementVisible(popover));
popover.popover = 'auto';
// Hit Escape:
priorFocus.focus();
assert_equals(document.activeElement, priorFocus);
popover.showPopover();
assert_equals(document.activeElement, expectedFocusedElement, `${testName} activated by popover.showPopover()`);
await sendEscape();
assert_equals(document.activeElement, priorFocus, 'prior element should get focus after Escape');
assert_false(isElementVisible(popover));
// Move focus into the popover, then hit Escape:
let containedButton = popover.querySelector('button');
if (containedButton) {
priorFocus.focus();
assert_equals(document.activeElement, priorFocus);
popover.showPopover();
containedButton.focus();
assert_equals(document.activeElement, containedButton);
await sendEscape();
assert_equals(document.activeElement, priorFocus, 'prior element should get focus after Escape');
assert_false(isElementVisible(popover));
}
// Change the popover type:
priorFocus.focus();
popover.showPopover();
assert_equals(document.activeElement, expectedFocusedElement, `${testName} activated by popover.showPopover()`);
assert_equals(popover.popover, 'auto', 'All popovers in this test should start as popover=auto');
popover.popover = 'manual';
assert_false(popover.matches(':popover-open'), 'Changing the popover type should hide the popover');
assert_equals(document.activeElement, priorFocus, 'prior element should get focus when the type is changed');
assert_false(isElementVisible(popover));
popover.popover = 'auto';
// Remove from the document:
priorFocus.focus();
popover.showPopover();
assert_equals(document.activeElement, expectedFocusedElement, `${testName} activated by popover.showPopover()`);
popover.remove();
assert_false(isElementVisible(popover), 'Removing the popover should hide it immediately');
if (!popover.hasAttribute('data-no-focus')) {
assert_not_equals(document.activeElement, priorFocus, 'prior element should *not* get focus when the popover is removed from the document');
}
document.body.appendChild(popover);
// Show a modal dialog:
priorFocus.focus();
popover.showPopover();
assert_equals(document.activeElement, expectedFocusedElement, `${testName} activated by popover.showPopover()`);
const dialog = document.body.appendChild(document.createElement('dialog'));
dialog.showModal();
assert_false(popover.matches(':popover-open'), 'Opening a modal dialog should hide the popover');
assert_not_equals(document.activeElement, priorFocus, 'prior element should *not* get focus when a modal dialog is shown');
assert_false(isElementVisible(popover));
dialog.close();
dialog.remove();
// Use an activating element:
const button = addInvoker(t, popover);
priorFocus.focus();
button.click();
assert_true(popover.matches(':popover-open'));
assert_equals(document.activeElement, expectedFocusedElement, `${testName} activated by button.click()`);
// Make sure Escape works in the invoker case:
await sendEscape();
assert_equals(document.activeElement, priorFocus, 'prior element should get focus after Escape (via invoker)');
assert_false(isElementVisible(popover));
// Make sure we can directly focus the (already open) popover:
priorFocus.focus();
button.click();
assert_true(popover.matches(':popover-open'));
assert_equals(document.activeElement, expectedFocusedElement, `${testName} activated by button.click()`);
popover.focus();
assert_equals(document.activeElement, popover.hasAttribute('tabindex') || popover.tagName === 'DIALOG' ? popover : expectedFocusedElement, `${testName} directly focus with popover.focus()`);
button.click(); // Button is set to toggle the popover
assert_false(popover.matches(':popover-open'));
assert_equals(document.activeElement, priorFocus, 'prior element should get focus on button-toggled hide');
assert_false(isElementVisible(popover));
}, "Popover focus test: " + testName);
promise_test(async t => {
const priorFocus = addPriorFocus(t);
assert_false(popover.matches(':popover-open'), 'popover should start out hidden');
let button = addInvoker(t, popover);
assert_equals(button.getAttribute('popovertarget'), popover.id, 'This test assumes the button uses `popovertarget`.');
assert_not_equals(button, priorFocus, 'Stranger things have happened');
assert_false(popover.contains(button), 'Start with a non-contained button');
priorFocus.focus();
assert_equals(document.activeElement, priorFocus);
popover.showPopover();
assert_true(popover.matches(':popover-open'));
await clickOn(button); // This will *not* light dismiss, but will "toggle" the popover.
assert_false(popover.matches(':popover-open'));
assert_equals(document.activeElement, button, 'focus should move to the button when clicked, and should stay there when the popover closes');
assert_false(isElementVisible(popover));
// Same thing, but the button is contained within the popover
button.setAttribute('popovertarget', popover.id);
button.setAttribute('popovertargetaction', 'hide');
popover.appendChild(button);
t.add_cleanup(() => button.remove());
priorFocus.focus();
popover.showPopover();
assert_true(popover.matches(':popover-open'));
const changesFocus = !popover.hasAttribute('data-no-focus');
if (changesFocus) {
assert_not_equals(document.activeElement, priorFocus, 'focus should shift for this element');
}
await clickOn(button);
assert_false(popover.matches(':popover-open'), 'clicking button should hide the popover');
assert_equals(document.activeElement, priorFocus, 'Contained button should return focus to the previously focused element');
assert_false(isElementVisible(popover));
// Same thing, but the button is unrelated (no popovertarget)
button = document.createElement('button');
button.setAttribute("tabindex", "0");
document.body.appendChild(button);
priorFocus.focus();
popover.showPopover();
assert_true(popover.matches(':popover-open'));
await clickOn(button); // This will light dismiss the popover, focus the prior focus, then focus this button.
assert_false(popover.matches(':popover-open'), 'clicking button should hide the popover (via light dismiss)');
assert_equals(document.activeElement, button, 'Focus should go to unrelated button on light dismiss');
assert_false(isElementVisible(popover));
}, "Popover button click focus test: " + testName);
promise_test(async t => {
if (popover.hasAttribute('data-no-focus')) {
// This test only applies if the popover changes focus
return;
}
const priorFocus = addPriorFocus(t);
assert_false(popover.matches(':popover-open'), 'popover should start out hidden');
// Move the prior focus out of the document
priorFocus.focus();
popover.showPopover();
assert_true(popover.matches(':popover-open'));
const newFocus = document.activeElement;
assert_not_equals(newFocus, priorFocus, 'focus should shift for this element');
priorFocus.remove();
assert_equals(document.activeElement, newFocus, 'focus should not change when prior focus is removed');
popover.hidePopover();
assert_not_equals(document.activeElement, priorFocus, 'focused element has been removed');
assert_false(isElementVisible(popover));
document.body.appendChild(priorFocus); // Put it back
// Move the prior focus inside the (already open) popover
priorFocus.focus();
popover.showPopover();
assert_true(popover.matches(':popover-open'));
assert_false(popover.contains(priorFocus), 'Start with a non-contained prior focus');
popover.appendChild(priorFocus); // Move inside the popover
assert_true(popover.contains(priorFocus));
assert_true(popover.matches(':popover-open'), 'popover should stay open');
popover.hidePopover();
assert_false(isElementVisible(popover));
assert_not_equals(document.activeElement, priorFocus, 'focused element is display:none inside the popover');
document.body.appendChild(priorFocus); // Put it back
}, "Popover corner cases test: " + testName);
}
document.querySelectorAll('body > [popover]').forEach(popover => activateAndVerify(popover));
</script>
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