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What?

This reduces the specificity of the link selector.

Why?

Having a highly specific link selector makes it more complicated for themes to override these rules - see #42616.

How?

:where reduces the specificity of the :not selector to zero, so this now has the same specificity as before.

Testing Instructions

  1. Add a post with some links
  2. Add this to your theme's CSS:
a {
	text-decoration: line-through;
}
  1. Your links should have a line though them!

Screenshots or screencast

Screenshot 2022-07-25 at 12 03 10

cc @WordPress/block-themers

@scruffian scruffian added the [Feature] Themes Questions or issues with incorporating or styling blocks in a theme. label Jul 25, 2022
@scruffian scruffian requested a review from spacedmonkey as a code owner July 25, 2022 11:04
@scruffian scruffian self-assigned this Jul 25, 2022
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@draganescu draganescu left a comment

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The technique was used in the past and it worked 🚢
It does feel like all core CSS will end up being in :where ...

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@aristath aristath left a comment

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LGTM! 👍
There are some failing tests because we'll need to update the CSS strings in the test files, but other than that it looks good. I'm pre-approving this PR so it can get merged once the tests get fixed 🎉

@ZebulanStanphill ZebulanStanphill added CSS Styling Related to editor and front end styles, CSS-specific issues. [Type] Regression Related to a regression in the latest release labels Jul 25, 2022
@getdave
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getdave commented Jul 26, 2022

TIL. Thanks @scruffian

@scruffian scruffian merged commit 226f3fe into trunk Jul 27, 2022
@scruffian scruffian deleted the fix/42616 branch July 27, 2022 10:03
@github-actions github-actions bot added this to the Gutenberg 13.8 milestone Jul 27, 2022
pento pushed a commit to WordPress/wordpress-develop that referenced this pull request Sep 10, 2022
This commit backports the original PRs from Gutenberg repository:

* [WordPress/gutenberg#40260 #40260 Add support for button elements to theme.json]
* [WordPress/gutenberg#40889 #40889 Theme Json: Don't output double selectors for elements inside blocks]
* [WordPress/gutenberg#41140 #41140 Global Styles: Add support for caption elements]
* [WordPress/gutenberg#41160 #41160 Global Styles: Load block CSS conditionally]
* [WordPress/gutenberg#41240 #41240 Global Styles: Button Element: update button element selector]
* [WordPress/gutenberg#41335 #41335 Duotone: Fix CSS Selectors rendered by theme.json duotone/filter settings for blocks on public pages]
* [WordPress/gutenberg#41446 #41446 Block styles: Account for style block nodes that have no name]
* [WordPress/gutenberg#41696 #41696 Global Styles: Allow references to values in other locations in the tree]
* [WordPress/gutenberg#41753 #41753 Elements: Add an API make it easier to get class names]
* [WordPress/gutenberg#41786 #41786 Support pseudo selectors on elements in theme json]
* [WordPress/gutenberg#41822 #41822 Elements: Button - Fix element selectors]
* [WordPress/gutenberg#41981 #41981 Global Styles: Add support for heading elements]
* [WordPress/gutenberg#42072 #42072 Fix link element hover bleeding into button element default styles]
* [WordPress/gutenberg#42096 #42096 Add visited to link element allowed pseudo selector list]
* [WordPress/gutenberg#42669 #42669 Link elements: Add a :where selector to the :not to lower specificity]
* [WordPress/gutenberg#42776 #42776 Theme JSON: Add a static $blocks_metadata data definition to the Gutenberg instance of WP_Theme_JSON]
* [WordPress/gutenberg#43088 #43088 Pseudo elements supports on button elements]
* [WordPress/gutenberg#43167 #43167 Theme_JSON: Use existing append_to_selector for pseudo elements]
* [WordPress/gutenberg#43988 #43988 Styles API: Fixed selectors for nested elements]

Props onemaggie, bernhard-reiter, cbravobernal, mmaattiiaass, scruffian, andraganescu, dpcalhoun, get_dave, Mamaduka, SergeyBiryukov.
See #56467.

git-svn-id: https://develop.svn.wordpress.org/trunk@54118 602fd350-edb4-49c9-b593-d223f7449a82
markjaquith pushed a commit to markjaquith/WordPress that referenced this pull request Sep 10, 2022
This commit backports the original PRs from Gutenberg repository:

* [WordPress/gutenberg#40260 #40260 Add support for button elements to theme.json]
* [WordPress/gutenberg#40889 #40889 Theme Json: Don't output double selectors for elements inside blocks]
* [WordPress/gutenberg#41140 #41140 Global Styles: Add support for caption elements]
* [WordPress/gutenberg#41160 #41160 Global Styles: Load block CSS conditionally]
* [WordPress/gutenberg#41240 #41240 Global Styles: Button Element: update button element selector]
* [WordPress/gutenberg#41335 #41335 Duotone: Fix CSS Selectors rendered by theme.json duotone/filter settings for blocks on public pages]
* [WordPress/gutenberg#41446 #41446 Block styles: Account for style block nodes that have no name]
* [WordPress/gutenberg#41696 #41696 Global Styles: Allow references to values in other locations in the tree]
* [WordPress/gutenberg#41753 #41753 Elements: Add an API make it easier to get class names]
* [WordPress/gutenberg#41786 #41786 Support pseudo selectors on elements in theme json]
* [WordPress/gutenberg#41822 #41822 Elements: Button - Fix element selectors]
* [WordPress/gutenberg#41981 #41981 Global Styles: Add support for heading elements]
* [WordPress/gutenberg#42072 #42072 Fix link element hover bleeding into button element default styles]
* [WordPress/gutenberg#42096 #42096 Add visited to link element allowed pseudo selector list]
* [WordPress/gutenberg#42669 #42669 Link elements: Add a :where selector to the :not to lower specificity]
* [WordPress/gutenberg#42776 #42776 Theme JSON: Add a static $blocks_metadata data definition to the Gutenberg instance of WP_Theme_JSON]
* [WordPress/gutenberg#43088 #43088 Pseudo elements supports on button elements]
* [WordPress/gutenberg#43167 #43167 Theme_JSON: Use existing append_to_selector for pseudo elements]
* [WordPress/gutenberg#43988 #43988 Styles API: Fixed selectors for nested elements]

Props onemaggie, bernhard-reiter, cbravobernal, mmaattiiaass, scruffian, andraganescu, dpcalhoun, get_dave, Mamaduka, SergeyBiryukov.
See #56467.
Built from https://develop.svn.wordpress.org/trunk@54118


git-svn-id: http://core.svn.wordpress.org/trunk@53677 1a063a9b-81f0-0310-95a4-ce76da25c4cd
github-actions bot pushed a commit to platformsh/wordpress-performance that referenced this pull request Sep 10, 2022
This commit backports the original PRs from Gutenberg repository:

* [WordPress/gutenberg#40260 #40260 Add support for button elements to theme.json]
* [WordPress/gutenberg#40889 #40889 Theme Json: Don't output double selectors for elements inside blocks]
* [WordPress/gutenberg#41140 #41140 Global Styles: Add support for caption elements]
* [WordPress/gutenberg#41160 #41160 Global Styles: Load block CSS conditionally]
* [WordPress/gutenberg#41240 #41240 Global Styles: Button Element: update button element selector]
* [WordPress/gutenberg#41335 #41335 Duotone: Fix CSS Selectors rendered by theme.json duotone/filter settings for blocks on public pages]
* [WordPress/gutenberg#41446 #41446 Block styles: Account for style block nodes that have no name]
* [WordPress/gutenberg#41696 #41696 Global Styles: Allow references to values in other locations in the tree]
* [WordPress/gutenberg#41753 #41753 Elements: Add an API make it easier to get class names]
* [WordPress/gutenberg#41786 #41786 Support pseudo selectors on elements in theme json]
* [WordPress/gutenberg#41822 #41822 Elements: Button - Fix element selectors]
* [WordPress/gutenberg#41981 #41981 Global Styles: Add support for heading elements]
* [WordPress/gutenberg#42072 #42072 Fix link element hover bleeding into button element default styles]
* [WordPress/gutenberg#42096 #42096 Add visited to link element allowed pseudo selector list]
* [WordPress/gutenberg#42669 #42669 Link elements: Add a :where selector to the :not to lower specificity]
* [WordPress/gutenberg#42776 #42776 Theme JSON: Add a static $blocks_metadata data definition to the Gutenberg instance of WP_Theme_JSON]
* [WordPress/gutenberg#43088 #43088 Pseudo elements supports on button elements]
* [WordPress/gutenberg#43167 #43167 Theme_JSON: Use existing append_to_selector for pseudo elements]
* [WordPress/gutenberg#43988 #43988 Styles API: Fixed selectors for nested elements]

Props onemaggie, bernhard-reiter, cbravobernal, mmaattiiaass, scruffian, andraganescu, dpcalhoun, get_dave, Mamaduka, SergeyBiryukov.
See #56467.
Built from https://develop.svn.wordpress.org/trunk@54118


git-svn-id: https://core.svn.wordpress.org/trunk@53677 1a063a9b-81f0-0310-95a4-ce76da25c4cd
whereiscodedude pushed a commit to whereiscodedude/wpss that referenced this pull request Sep 18, 2022
This commit backports the original PRs from Gutenberg repository:

* [WordPress/gutenberg#40260 #40260 Add support for button elements to theme.json]
* [WordPress/gutenberg#40889 #40889 Theme Json: Don't output double selectors for elements inside blocks]
* [WordPress/gutenberg#41140 #41140 Global Styles: Add support for caption elements]
* [WordPress/gutenberg#41160 #41160 Global Styles: Load block CSS conditionally]
* [WordPress/gutenberg#41240 #41240 Global Styles: Button Element: update button element selector]
* [WordPress/gutenberg#41335 #41335 Duotone: Fix CSS Selectors rendered by theme.json duotone/filter settings for blocks on public pages]
* [WordPress/gutenberg#41446 #41446 Block styles: Account for style block nodes that have no name]
* [WordPress/gutenberg#41696 #41696 Global Styles: Allow references to values in other locations in the tree]
* [WordPress/gutenberg#41753 #41753 Elements: Add an API make it easier to get class names]
* [WordPress/gutenberg#41786 #41786 Support pseudo selectors on elements in theme json]
* [WordPress/gutenberg#41822 #41822 Elements: Button - Fix element selectors]
* [WordPress/gutenberg#41981 #41981 Global Styles: Add support for heading elements]
* [WordPress/gutenberg#42072 #42072 Fix link element hover bleeding into button element default styles]
* [WordPress/gutenberg#42096 #42096 Add visited to link element allowed pseudo selector list]
* [WordPress/gutenberg#42669 #42669 Link elements: Add a :where selector to the :not to lower specificity]
* [WordPress/gutenberg#42776 #42776 Theme JSON: Add a static $blocks_metadata data definition to the Gutenberg instance of WP_Theme_JSON]
* [WordPress/gutenberg#43088 #43088 Pseudo elements supports on button elements]
* [WordPress/gutenberg#43167 #43167 Theme_JSON: Use existing append_to_selector for pseudo elements]
* [WordPress/gutenberg#43988 #43988 Styles API: Fixed selectors for nested elements]

Props onemaggie, bernhard-reiter, cbravobernal, mmaattiiaass, scruffian, andraganescu, dpcalhoun, get_dave, Mamaduka, SergeyBiryukov.
See #56467.
Built from https://develop.svn.wordpress.org/trunk@54118
ootwch pushed a commit to ootwch/wordpress-develop that referenced this pull request Nov 4, 2022
This commit backports the original PRs from Gutenberg repository:

* [WordPress/gutenberg#40260 #40260 Add support for button elements to theme.json]
* [WordPress/gutenberg#40889 #40889 Theme Json: Don't output double selectors for elements inside blocks]
* [WordPress/gutenberg#41140 #41140 Global Styles: Add support for caption elements]
* [WordPress/gutenberg#41160 #41160 Global Styles: Load block CSS conditionally]
* [WordPress/gutenberg#41240 #41240 Global Styles: Button Element: update button element selector]
* [WordPress/gutenberg#41335 #41335 Duotone: Fix CSS Selectors rendered by theme.json duotone/filter settings for blocks on public pages]
* [WordPress/gutenberg#41446 #41446 Block styles: Account for style block nodes that have no name]
* [WordPress/gutenberg#41696 #41696 Global Styles: Allow references to values in other locations in the tree]
* [WordPress/gutenberg#41753 #41753 Elements: Add an API make it easier to get class names]
* [WordPress/gutenberg#41786 #41786 Support pseudo selectors on elements in theme json]
* [WordPress/gutenberg#41822 #41822 Elements: Button - Fix element selectors]
* [WordPress/gutenberg#41981 #41981 Global Styles: Add support for heading elements]
* [WordPress/gutenberg#42072 #42072 Fix link element hover bleeding into button element default styles]
* [WordPress/gutenberg#42096 #42096 Add visited to link element allowed pseudo selector list]
* [WordPress/gutenberg#42669 #42669 Link elements: Add a :where selector to the :not to lower specificity]
* [WordPress/gutenberg#42776 #42776 Theme JSON: Add a static $blocks_metadata data definition to the Gutenberg instance of WP_Theme_JSON]
* [WordPress/gutenberg#43088 #43088 Pseudo elements supports on button elements]
* [WordPress/gutenberg#43167 #43167 Theme_JSON: Use existing append_to_selector for pseudo elements]
* [WordPress/gutenberg#43988 #43988 Styles API: Fixed selectors for nested elements]

Props onemaggie, bernhard-reiter, cbravobernal, mmaattiiaass, scruffian, andraganescu, dpcalhoun, get_dave, Mamaduka, SergeyBiryukov.
See #56467.

git-svn-id: https://develop.svn.wordpress.org/trunk@54118 602fd350-edb4-49c9-b593-d223f7449a82
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