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Try additional CSS selectors for Button block styles #36130

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@jffng jffng commented Nov 1, 2021

Description

In Twenty Twenty-Two, we want to style the buttons in the Search block and File block, and we want them to be consistent with the button block styling. This might ideally be done via theme.json in the future, but needs more consideration (see #29167).

We don't want to write CSS to target these buttons because those styles would not be configurable via global styles. So I had a different idea — output additional selectors to the same CSS declaration generated from theme.json's styles.blocks.core/button, to target the buttons inside the Search and File block.

This PR does two main things:

  • Adds a new block supports key to the Button block called "__experimentalAdditionalSelectors". The name could use some work. Global styles checks for this support key and if it exists, appends its value to the primary selector.
  • Makes some changes to the default CSS for Search block and File block to match the default button block styling

Questions

  • Does this idea make sense?
  • Could we make this opt in, and the additional selectors configurable in theme.json on a per block basis?

How has this been tested?

  • Activate 2022
  • Use this testing content (you will probably need to replace the File block's reference): https://gist.github.com/jffng/263436360988105ab73c35effd494fe0
  • Verify the Search and File buttons appear with the same styles as the default Block button
  • Verify you can still change the color of the search button via the post editor.

Screenshots

Before After
Screen Shot 2021-11-01 at 6 37 25 PM Screen Shot 2021-11-01 at 6 34 53 PM

Types of changes

New feature

Checklist:

  • My code is tested.
  • My code follows the WordPress code style.
  • My code follows the accessibility standards.
  • I've tested my changes with keyboard and screen readers.
  • My code has proper inline documentation.
  • I've included developer documentation if appropriate.
  • I've updated all React Native files affected by any refactorings/renamings in this PR (please manually search all *.native.js files for terms that need renaming or removal).

@jffng jffng added [Block] Buttons Affects the Buttons Block [Feature] Themes Questions or issues with incorporating or styling blocks in a theme. Global Styles Anything related to the broader Global Styles efforts, including Styles Engine and theme.json labels Nov 1, 2021
@@ -77,7 +77,8 @@
"radius": true,
"__experimentalSkipSerialization": true
},
"__experimentalSelector": ".wp-block-button__link"
"__experimentalSelector": ".wp-block-button__link",
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We could also just change this to include the additional selectors...

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Size Change: +189 B (0%)

Total Size: 1.08 MB

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@jffng jffng changed the title Try additional CSS selectors for theme.json block styles Try additional CSS selectors for Button block styles Nov 1, 2021
@oandregal
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Hey, this is an issue and there are some alternatives:

  1. Consider adding form elements to the theme.json elements block #34198
  2. Allow registering additional CSS selectors for blocks (to be used by theme.json) #34196

I'd think this PR is too risky to add for 5.9. It raises the question as to why a given block (button) should control other block's styles (search & files): this breaks the block contract (each one is isolated from the others). If we still wanted to go with this, at the practical level, we'd need to test this works well as we may run into multiple specificity clashes.

One potential way forward would be to move this to the theme territory until core has a solution. I'd do something similar to what I suggested here #34141 (comment) TLDR: generate css custom properties that track the button styles to reuse in whatever other blocks the theme wants.

@jffng
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jffng commented Nov 8, 2021

One potential way forward would be to move this to the theme territory until core has a solution. I'd do something similar to what I suggested here #34141 (comment) TLDR: generate css custom properties that track the button styles to reuse in whatever other blocks the theme wants.

Tried that here, it works but this feedback is still relevant, just defers it to the theme:

It raises the question as to why a given block (button) should control other block's styles (search & files): this breaks the block contract (each one is isolated from the others).

Closing this PR for now until we more clarity around how styling these elements should be handled.

@jffng jffng closed this Nov 8, 2021
@scruffian scruffian deleted the add/search-block-styles branch November 15, 2021 10:43
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