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Reduce specificity of legacy font sizes defined by core #37819

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merged 1 commit into from
Jan 10, 2022

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@oandregal oandregal commented Jan 10, 2022

Related #37617

There's an issue by which legacy font sizes (normal & huge) provided by core override the theme classes in WordPress 5.9 (or using the Gutenberg plugin).

Why it happens

  1. In WordPress 5.8 font-size classes were provided via a CSS stylesheet that we enqueued to all themes. In Remove font size classes that are enqueued in the global stylesheet #35182 these were removed in favor of the global stylesheet, as to avoid enqueuing the same styles twice. In doing so, the classes changed from
  • class in WordPress 5.8: .has-<slug>-font-size { font-size: value; }
  • class in WordPress 5.9: .has-<slug>-font-size { font-size: var(--wp--preset--font-size-<slug>) !important; }
  1. Later on, the default values for font sizes were updated and two of them were removed: normal and huge at Font sizes: update default values #37381 Because we still need to make them available for old content, those classes were moved back to the old bundle. However, they still have an !important that makes it difficult for others to override, which doesn't make sense for a legacy default.

The fix

For the two legacy font sizes (normal and huge) we should reduce the specificity back to what it was: .has-<slug>-font-size { font-size: value; }.

How to test

  • Use a WordPress 5.8 with the Gutenberg plugin active (this branch).
  • Use the TwentyTwenty theme.
  • Create a post with a paragraph. Set the paragraph font size to normal and publish.

The expected result is that the paragraph font size is the one defined by the theme, 21px. If using the plugin from the trunk branch, what happens is that the font size is 16px instead.

@oandregal oandregal requested a review from ajitbohra as a code owner January 10, 2022 11:41
@oandregal oandregal self-assigned this Jan 10, 2022
@oandregal oandregal added [Type] Bug An existing feature does not function as intended Global Styles Anything related to the broader Global Styles efforts, including Styles Engine and theme.json labels Jan 10, 2022
@oandregal
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@Mamaduka @noisysocks I've milestoned this one for 5.9, in case you think there's still leeway to include it.

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@aristath aristath left a comment

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LGTM and makes perfect sense 👍

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Size Change: -16 B (0%)

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Thanks for working on this, @oandregal.

Changes make sense to me as well. I'm going to add Backport label.

@Mamaduka Mamaduka 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 Jan 10, 2022
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Thanks for staying on this. This seems like a good step forward, and it's always nice to see specificity lowered.

@noisysocks noisysocks merged commit 123c9cc into trunk Jan 10, 2022
@noisysocks noisysocks deleted the update/specificity-for-legacy-fonts branch January 10, 2022 22:44
@github-actions github-actions bot added this to the Gutenberg 12.4 milestone Jan 10, 2022
@noisysocks noisysocks 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 Jan 10, 2022
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