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Blocks: Set default 'apiVersion' for client-side registration #70750

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Merged
merged 2 commits into from
Jul 17, 2025

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Mamaduka
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What?

PR updates block type processing helper function and sets the default - apiVersion: 1.

Why?

  • Ensures apiVersion is always defined during block registration.
  • Matches the defaults provided by the server. Sources: one and two.

Testing Instructions

  1. Open a post or page.
  2. Do a client-side block registration via the registerBlockType function.
  3. Confirm that the registered block has the default apiVersion set - wp.blocks.getBlockType( 'test/block-api-version' );.

Example Block

const { createElement: el } = wp.element;
const { registerBlockType } = wp.blocks;
const { useBlockProps } = wp.blockEditor;

registerBlockType( 'test/block-api-version', {
	apiVersion: 3,
	title: 'Test Block: apiVersion',
	icon: 'list-view',
	category: 'text',

	edit: function Edit() {
		const blockProps = useBlockProps();

		return el(
			'div',
			{ ...blockProps },
			'hello'
		);
	},
} );

Testing Instructions for Keyboard

Same.

@Mamaduka Mamaduka self-assigned this Jul 17, 2025
@Mamaduka Mamaduka added [Feature] Block API API that allows to express the block paradigm. [Type] Code Quality Issues or PRs that relate to code quality labels Jul 17, 2025
@Mamaduka Mamaduka requested review from jsnajdr and gziolo July 17, 2025 05:33
@Mamaduka Mamaduka force-pushed the fix/block-default-api-version branch from d9873af to 55f9a1e Compare July 17, 2025 05:43
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github-actions bot commented Jul 17, 2025

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Co-authored-by: Mamaduka <mamaduka@git.wordpress.org>
Co-authored-by: tyxla <tyxla@git.wordpress.org>

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github-actions bot commented Jul 17, 2025

Size Change: +10 B (0%)

Total Size: 1.89 MB

Filename Size Change
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@Mamaduka Mamaduka requested a review from tyxla July 17, 2025 08:10
@@ -78,6 +78,7 @@ export const processBlockType =
const bootstrappedBlockType = select.getBootstrappedBlockType( name );

const blockType = {
apiVersion: 1,
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Like we see by needing to update a bunch of tests, this might break some tests or any custom extension logic that performs strict checking of block type.

With that in mind, should we potentially document it as a breaking change in the package?

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This is more like internal breaking change, shouldn’t affect most of consumers. But I’ll add changelog entry.

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LGTM 👍

Good to go after adding a CHANGELOG entry.

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Thanks for the feedback, @tyxla!

@Mamaduka Mamaduka merged commit e4cd952 into trunk Jul 17, 2025
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@Mamaduka Mamaduka deleted the fix/block-default-api-version branch July 17, 2025 11:51
@github-actions github-actions bot added this to the Gutenberg 21.3 milestone Jul 17, 2025
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jsnajdr commented Jul 21, 2025

As an aside, I think we're being unreasonably conservative with apiVersion. The default should have been 3 for a long time now.

The 1 to 2 switch happened 5 years ago (in #19701 and related PRs) and is related to how the save function works and how blocks render their DOM. @ellatrix should know more, I don't understand the details.

The 2 to 3 switch happened 2.5 years ago because of iframing the block editor and the block styles compatibility issues it causes (tracked in #33346).

Shouldn't we expect all blocks to be compatible with v3 by now? Each version bump is triggered by exactly one change, a rather minor one for most block authors. Is this what @t-hamano aims for with #70743 and related PRs?

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Shouldn't we expect all blocks to be compatible with v3 by now? Each version bump is triggered by exactly one change, a rather minor one for most block authors.

I wish that were the case. However, there are still many blocks that are incompatible with iframes. We've had to revert push for iframed editors, almost every major release I can recall.

Issue #70743 is an attempt to find some common ground and encourage developers to make their blocks compatible.

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We've had to revert push for iframed editors, almost every major release I can recall.

It's the same in my memory 😅 Personally, I think it would be ok to change the default api version from 1 to 3 if we publish a dev note.

USERSATOSHI pushed a commit to USERSATOSHI/gutenberg that referenced this pull request Jul 23, 2025
…ess#70750)

* Blocks: Set default 'apiVersion' for client-side registration
* Add changelong entry

Co-authored-by: Mamaduka <mamaduka@git.wordpress.org>
Co-authored-by: tyxla <tyxla@git.wordpress.org>
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[Feature] Block API API that allows to express the block paradigm. [Type] Code Quality Issues or PRs that relate to code quality
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4 participants