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Add aria-label attribute to navigation block only when it is open #54816

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merged 5 commits into from
Oct 10, 2023

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What?

Fix the issue reported here.

This pull request adds the logic to only add the aria-label attribute to the navigation block when this is open.

Why?

As reported in the mentioned issue, it is causing accessibility issues.

How?

I basically removed that attribute from the server side rendering and added some logic in JavaScript to load it conditionally only when the menu is open.

I also removed an unnecessary prop of the React component used in the editor.

Testing Instructions

Before this fix

  1. Add a navigation block to your site with the overlay setting set to "Mobile".
  2. In the desktop view: Go to the frontend and inspect the div with class wp-block-navigation__responsive-dialog. It has the attribute aria-label="Menu", which is not correct.

After this fix

  1. Add a navigation block to your site with the overlay setting set to "Mobile".
  2. In the desktop view: Go to the frontend and inspect the div with class wp-block-navigation__responsive-dialog. It has NOT the attribute aria-label.
  3. In the mobile view: Open the menu and check that the attribute aria-label="Menu" is added.
  4. Close the menu and check that the attribute is removed.

@SantosGuillamot SantosGuillamot added [Type] Bug An existing feature does not function as intended [Block] Navigation Affects the Navigation Block [Feature] Interactivity API API to add frontend interactivity to blocks. labels Sep 26, 2023
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github-actions bot commented Sep 26, 2023

Size Change: +26.2 kB (+2%)

Total Size: 1.65 MB

Filename Size Change
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ℹ️ View Unchanged
Filename Size
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@SantosGuillamot SantosGuillamot added the Backport to WP 6.7 Beta/RC Pull request that needs to be backported to the WordPress major release that's currently in beta label Sep 28, 2023
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The new logic looks good to me, but I think we should escape the context before merging 🙂

@@ -698,7 +698,7 @@ function render_block_core_navigation( $attributes, $content, $block ) {
if ( $should_load_view_script ) {
$nav_element_directives = '
data-wp-interactive
data-wp-context=\'{ "core": { "navigation": { "overlayOpenedBy": {}, "type": "overlay", "roleAttribute": "" } } }\'
data-wp-context=\'{ "core": { "navigation": { "overlayOpenedBy": {}, "type": "overlay", "roleAttribute": "", "ariaLabel": "' . __( 'Menu' ) . '" } } }\'
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We should escape this because translations might include not supported characters (like quotes or brackets…). Or just move the whole context into a $context variable and use wp_json_encode( $context ) instead.

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That makes sense 🙂 I added the esc_attr__ function. I hope that is enough. If you feel it is clearer, I'm happy to mode it to a $context variable.

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I think that one turns things like " into ", and it needs to be \". But I'm not an expert on this, so maybe I'm wrong. Can you check if JSON.parse() turns the escaped items (like " or >) back to its original form?

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Oh, you're right. esc_attr__ doesn't seem to be working fine. If I include a quote " inside the string, it is not able to parse it and it throws an error. I believe we have two options:

  • Use wp_slash or directly addslashes.
  • Move it to a variable and use wp_json_encode as you suggested. We are using it in the query block: link.

I've tested both approaches and they seem to work. Any preference?

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wp_json_encode seems more explicit and secure 🙂

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Thanks for taking a look at this, @SantosGuillamot. I can see in the video you shared that the problem arises when the data-wp-context directive runs in PHP.

What I don't fully understand is that it seems to be an issue serializing the context as JSON (instead of parsing)... 🤔

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I looked at the HTML when using it in the navigation block.

In the client

  • Without the JSON_HEX_APOS, the HTML is data-wp-context="{"text":"I" m="" a="" string"}'="".
  • With JSON_HEX_APOS, the HTML is data-wp-context="{"text":"I\u0027m a string"}".

In the server

  • Without the JSON_HEX_APOS, the HTML is data-wp-context='{"text":"I'm a string"}'.
  • With JSON_HEX_APOS, the HTML is data-wp-context='{"text":"I\u0027m a string"}'.

So something seems definitely broken, right?

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Okay, I've added the flags to both the navigation and the query blocks. Let me know if something else is needed.

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For context, the "Fatal error" that can be seen in #54816 (comment) is caused by a problem insidegutenberg_interactivity_process_wp_context implementation, which is calling $context->rewind_context() even when no context where added on a potential failure. That could empty the context stack and make subsequent $context->set_context( $new_context ) calls fail.

I'll open an issue to address that later on.

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Thanks for working on this. From an a11y perspective looks good to me.
I'd leave the code review to others more familiar than me with this implementation.

Note: I could use this approach also for #55010

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github-actions bot commented Oct 6, 2023

Flaky tests detected in b8f157d.
Some tests passed with failed attempts. The failures may not be related to this commit but are still reported for visibility. See the documentation for more information.

🔍 Workflow run URL: https://github.com/WordPress/gutenberg/actions/runs/6430096160
📝 Reported issues:

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Thanks for looking into this, Mario & David!


We defintely need to create a helper function. People using the Interactivity API should not have to remember to use all those flags 😄

Discussion here:

@SantosGuillamot SantosGuillamot enabled auto-merge (squash) October 6, 2023 12:27
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We defintely need to create a helper function. People using the Interactivity API should not have to remember to use all those flags 😄

Totally agree 🙂 It is not intuitive why those flags, and not others, are needed.

By the way, it seems a test of the cover block is failing. I cannot see the relation with this pull request and it seems it's failing in other PRs like this one as well. I'll rerun the tests once that is solved.

@SantosGuillamot SantosGuillamot merged commit f6b21db into trunk Oct 10, 2023
51 checks passed
@SantosGuillamot SantosGuillamot deleted the fix/aria-label-navigation-block branch October 10, 2023 04:14
@github-actions github-actions bot added this to the Gutenberg 16.9 milestone Oct 10, 2023
mikachan pushed a commit that referenced this pull request Oct 10, 2023
…54816)

* Add `aria-label` only when is open

* Remove unnecessary `label` property in edit

* Escape translation

* Move navigation context to `wp_json_encode`

* Add `wp_json_encode` flags
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I just cherry-picked this PR to the 6.4-beta3-2 branch to get it included in the next release: 80e0020

@mikachan mikachan removed the Backport to WP 6.7 Beta/RC Pull request that needs to be backported to the WordPress major release that's currently in beta label Oct 10, 2023
karmatosed pushed a commit that referenced this pull request Oct 10, 2023
* Site Editor Styles Screen: Fix dancing styles previews (#55183)

* Pulling across changes from WordPress/wordpress-develop#5441 (#55181)

Removed var

* Add `aria-label` attribute to navigation block only when it is open (#54816)

* Add `aria-label` only when is open

* Remove unnecessary `label` property in edit

* Escape translation

* Move navigation context to `wp_json_encode`

* Add `wp_json_encode` flags

* Paste: fix MS Word list paste (#55127)

* Paste: fix MS Word list paste

* Match mso-list:Ignore

* Fix inline paste

* Fix scrollbars on pattern transforms (#55069)

* Fix scrollbars on pattern transforms

* Fix single pattern previews

* Improve classname semantics

* Remove modal title

* Reset styles on window resize (#55077)

Co-authored-by: Ricardo Artemio Morales <[email protected]>

---------

Co-authored-by: Andrew Serong <[email protected]>
Co-authored-by: Ramon <[email protected]>
Co-authored-by: Mario Santos <[email protected]>
Co-authored-by: Ella <[email protected]>
Co-authored-by: Daniel Richards <[email protected]>
Co-authored-by: Ricardo Artemio Morales <[email protected]>
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Labels
[Block] Navigation Affects the Navigation Block [Feature] Interactivity API API to add frontend interactivity to blocks. [Type] Bug An existing feature does not function as intended
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5 participants