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Categories List Block: Match the markup on the block editor to the front end #43666

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merged 2 commits into from
Sep 10, 2022

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t-hamano
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Fix: #42984

What?

This PR makes the markup on the block editor the same as on the front editor in order to keep the markup consistent.

Why?

If class names and makups are different between the editor and the front end, it will be difficult to use a common selector for styling.

Also, I could not find any reason for different markup on the editor.

How?

In order to get closer to the frontend markup, I have taken the following actions:

  • Change the block tag according to its display status (i.e., when displayed in a list, it becomes ul tag)
  • Remove unused elements and class names on the front end (.wp-block-categories__list, .wp-block-categories__list-level-{level}, .wp-block-categories__post-count, .wp-block-categories__dropdown
  • Add empty option tag ("Select Category") to dropdown
  • Add missing class names (li.cat-item,cat-item-{id}, option.level-{level})

Testing Instructions

  • Insert the Categories List Block.
  • Toggle the option variations and confirm that the frontend and block editor markup is nearly identical for both variations.

Screenshots or screencast

Below is a comparison of the block editor and front-end markup for one variation.

Frontend

frontend

Block Editor

block-editor

@t-hamano t-hamano added [Type] Enhancement A suggestion for improvement. [Block] Categories Affects the Categories Block CSS Styling Related to editor and front end styles, CSS-specific issues. labels Aug 27, 2022
@t-hamano t-hamano self-assigned this Aug 27, 2022
@t-hamano t-hamano requested a review from ajitbohra as a code owner August 27, 2022 12:54
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github-actions bot commented Aug 27, 2022

Size Change: +56 B (0%)

Total Size: 1.25 MB

Filename Size Change
build/block-library/index.min.js 188 kB +56 B (0%)
ℹ️ View Unchanged
Filename Size
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@carolinan
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Wish: To be able to style the post count, the span and the class name that was used in the editor should be added to the front instead of removed from the editor.

@t-hamano
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t-hamano commented Sep 5, 2022

Wish: To be able to style the post count, the span and the class name that was used in the editor should be added to the front instead of removed from the editor.

Thanks for your input!
On the front end, the block is output via wp_list_categories.
And the "Show post counts" option is internally controlled at this lines in the WordPress core:
https://github.com/WordPress/wordpress-develop/blob/de3fbdecc0eca1ec876dfd04bbf642a7f60a57b4/src/wp-includes/class-walker-category.php#L192-L194

So this might be something to consider in the WordPress core.

Also, there is wp_list_categories filter hook to rewrite the final HTML, but I think this should be used by the user, not by the core block.

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I have tested the PR, and I have not found any issues. Moving the class wp-block-categories-dropdown from the select to the wrapping div is an improvement.

I found one plugin in the plugin directory that styles this class:
https://wpdirectory.net/search/01GCGP40C3JA2F62XNK7G0VQTV

There are 251 themes in the theme directory that styles this class, but I did not dig deep enough to see if it was an editor style or front end style:
https://wpdirectory.net/search/01GCGP7P7R5R9YFQ98S4VGA0GY

I would consider the change low risk.

@t-hamano
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t-hamano commented Sep 10, 2022

@carolinan
Thank you for investigating the scope of the impact!
I, too, consider this change low risk.
In the past, PRs with markup changes in the editor has not specifically mentioned the scope of their impact, and I believe this PR is similar.

Therefore, I would like to merge this PR as is.

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Labels
[Block] Categories Affects the Categories Block CSS Styling Related to editor and front end styles, CSS-specific issues. [Type] Enhancement A suggestion for improvement.
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Categories List block: CSS classes inconsistency in the list
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