Image: Improve focus management in lightbox #55428
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This commit removes the logic to set focus differently based on event.pointerType and instead sets focus on the dialog itself when the lightbox opens, and on the lightbox trigger when the lightbox closes.
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Size Change: +1 B (0%) Total Size: 1.66 MB
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One issue with setting the focus on the dialog itself as recommended in #55414 is that this causes unexpected behavior in Safari. Usually it will cause VoiceOver to say that focus is on the close button, but it will not respond to an I've recorded a video showing this behavior while casting the keystrokes to the screen: Lightbox.Focus.Test.mp4 |
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Flaky tests detected in 6c1090a. 🔍 Workflow run URL: https://github.com/WordPress/gutenberg/actions/runs/6578277725
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I'm ready to get additional eyes on this and suggestions on how to improve the implementation. As of this writing, I've been unable to solve this issue in Safari while setting focus on the modal itself, i.e the element with |
artemiomorales
added
[Type] Bug
It turns out that placing focus on the modal was causing inconsistent behavior in Safari, so I've put the focus back on the close button when the lightbox opens, which performs predictably. I've also added a tabindex to the image, which prevents the focus ring from erroneously showing when opening the lightbox with a mouse in Chrome and Firefox.
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@afercia After looking at this with @SantosGuillamot, I don't think there's a way to set focus to the whole modal dialog without causing unexpected behavior (see video above). So with that in mind, I've set the focus back to the close button, and I've also added a I know you're not a fan of making the image itself clickable, but are there any technical drawbacks to adding a |
artemiomorales
requested review from
mtias,
jameskoster,
jasmussen and
richtabor
@artemiomorales thanks for looking into this.
This is expected behavior. There is one thing that behaves differently compared to the editor Mocal component though. As an aside and out of curiosity, I spent some time trying to debug the Safari + VoiceOver behavior. I think it's something specific to Safari and the aria-modal attribute.
So it appears that Safari, when it sees an aria-modal attribute, now moves focus to the first focusable element within the element with aria-modal. To me, this is a bug. It may be related to recent work that browser vendors have been doing to align their implementations with the new focus steps for the HTML |
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@aristath @carolinan and myself had a look at this and we think it's the smallest amount of changes we can introduce since we are in RC1. We recommend final review and testing with all major browsers. @joedolson @alexstine I'd appreciate your thoughts and testing, especially with Windows screen readers. Thanks. There are outstanding, broader, issues that would require some discussion and this is not the right time for that, as we are in RC1:
We agree all these points can't be addressed now. The should be addressed soon in the next release though. |
afercia
reviewed
Oct 19, 2023
alexstine
approved these changes
Oct 19, 2023
jameskoster
approved these changes
Oct 19, 2023
michalczaplinski
approved these changes
Oct 19, 2023
@afercia Thank you for your detailed analysis and exploration. The approach we have now looks good to me. I've pushed a change removing the extra |
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Thanks everyone for the PR, review, and feedback. From an a11y perspective, this looks good to me though I'd like to see it tested with WIndows screen readers. We can investigate the different behavior of Safari / VoiceOver with the Lightbox modal dialog compared to the editor Modal component later in teh next release cycle. |
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I quickly tested on gutenberg.run with latest Firefox and NVDA.
Notice the doubled images within the dialog are both announced. I will create a follow-up issue to evaluate improvements for the pending points. |
alexstine
approved these changes
Oct 20, 2023
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@artemiomorales Tested on Windows with NVDA in Google Chrome and Firefox. This works well enough for now. Let's land it.
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Great, thank you all for the feedback and testing! This has been merged and will follow up on outstanding items in the next release cycle. |
SiobhyB
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Oct 20, 2023
* Improve focus management This commit removes the logic to set focus differently based on event.pointerType and instead sets focus on the dialog itself when the lightbox opens, and on the lightbox trigger when the lightbox closes. * Add delay before focusing when closing lightbox * Put focus back on close button when opening lightbox It turns out that placing focus on the modal was causing inconsistent behavior in Safari, so I've put the focus back on the close button when the lightbox opens, which performs predictably. I've also added a tabindex to the image, which prevents the focus ring from erroneously showing when opening the lightbox with a mouse in Chrome and Firefox. * Move focus to the dialog when opening the lightbox. * Fix SVG markup. * Consistent indentation with spaces. * Remove unnecessary tabindex --------- Co-authored-by: Andrea Fercia <[email protected]>
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Cherry-picked for inclusion in 6.4 in feefbe1. |
SiobhyB
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the
Backport to WP 6.7 Beta/RC
SiobhyB
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Oct 23, 2023
* Focus submenu button when clicked (#55198) * Focus element manually when open submenu on click * Try using `tabindex="-1"` * Use `tabindex="-1"` also in body when a submenu is opened * Replace tabindex with event listener * Explain the tabindex on <li> * Don't store the element on hover to restore the focus later * Improve explanations * Add tests to cover webkit frontend menu interactions Safari doesn't place focus on a clicked button as expected. These tests verify that when a submenu chevron button is clicked, focus is correctly placed on that button. It also verifies that the click on the body correctly closes any open submenus, which was failing in Safari. * Focus clicked button on Safari Combining the tabindex -1 on the parent li and focusing the button on Safari, and also checking that the relatedTarget is null inside the handleMenuFocusout seems to contain the focus within the menu to not fire the handleMenuFocusout as often, and still works to click on the body to close the menu. * Added the document.addEventListener body click back in Authored by Luis Herranz <[email protected]>. I'm just re-applying the change. * Remove tab keypresses from webkit menu interaction tests Tab keypreses on webkit playwright are really flakey (or it's something in our code that we haven't isolated) so I've split out the webkit tests to test everything I can without using a tab keypress. * Use body click instead for consistency across environments --------- Co-authored-by: Luis Herranz <[email protected]> Co-authored-by: Jerry Jones <[email protected]> * Make layout support compatible with enhanced pagination (#55416) * Make layout supports compatible with enhanced pagination * Use sanitize_title and add `layout` to the class name * Update default fullscreen icon for lightbox trigger (#55463) * Make duotone compatible with enhanced pagination (#55415) * Patterns: fix capabilities settings for pattern categories (#55379) Co-authored-by: Daniel Richards <[email protected]> * Revert "Patterns: fix capabilities settings for pattern categories (#55379)" This reverts commit 6f83c92. * Image block: wrap images with hrefs in an A tag (#55470) * This commit sees what happens when we wrap the image element in an A tag in the editor. This is to ensure any inherited styles from the link element, such as border color, apply to the image. * Removing duplicate <a href /> wrapper Adding disabled onClick and aria attribute * Image: Improve focus management in lightbox (#55428) * Improve focus management This commit removes the logic to set focus differently based on event.pointerType and instead sets focus on the dialog itself when the lightbox opens, and on the lightbox trigger when the lightbox closes. * Add delay before focusing when closing lightbox * Put focus back on close button when opening lightbox It turns out that placing focus on the modal was causing inconsistent behavior in Safari, so I've put the focus back on the close button when the lightbox opens, which performs predictably. I've also added a tabindex to the image, which prevents the focus ring from erroneously showing when opening the lightbox with a mouse in Chrome and Firefox. * Move focus to the dialog when opening the lightbox. * Fix SVG markup. * Consistent indentation with spaces. * Remove unnecessary tabindex --------- Co-authored-by: Andrea Fercia <[email protected]> * Fix: - Update the title when using enhanced pagination --------- Co-authored-by: Mario Santos <[email protected]> Co-authored-by: Luis Herranz <[email protected]> Co-authored-by: Jerry Jones <[email protected]> Co-authored-by: Artemio Morales <[email protected]> Co-authored-by: Glen Davies <[email protected]> Co-authored-by: Daniel Richards <[email protected]> Co-authored-by: Ramon <[email protected]> Co-authored-by: Andrea Fercia <[email protected]>
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What?
This PR makes the focus management more consistent in the image lightbox by removing the reference to
event.pointerTypeand the differentiation in behavior when using a mouse versus a keyboard.Why?
Addresses #55414 and improves on changes made in #55212.
Altogether, the previous approach was unreliable, so this PR aims to fix that.
How?
It removes the logic using
event.pointerType, and instead...tabindexof -1 to the image, which prevents the focus ring from erroneously showing around the close button when the lightbox is opened in Chrome and Firefox (the focus ring appears to always be visible in this case in desktop Safari, which appears to be the intended browser behavior).Testing Instructions
On keyboard, test that tabbing to the image will show the lightbox trigger button on focus and that pressing
EnterorSpacebaropens the lightbox as expected.While the lightbox is open, test that...
Escapecloses the lightboxTabwill move focus to the close button and trap itEnterorSpacebarwhile on the close button will close the lightboxWhen the lightbox closes, make sure focus is set on the lightbox trigger.