Cannot get blockGap when skipping supports.spacing serialisation.

[inc2734]

Description

If the serialisation of supports.spacing is skipped, getSpacingClassesAndStyles() can be used to obtain the spacing styles.

In this case, padding and margins are correctly retrieved, but blockGap is not.

Step-by-step reproduction instructions

1. In block.json, set supports.spacing.__experimentalSkipSerialisation to true.
2. In Edit import { __experimentalGetSpacingClassesAndStyles as useSpacingProps } from '@wordpress/block-editor';.
3. In Edit const spacingProps = useSpacingProps( attributes );

Screenshots, screen recording, code snippet

block.json

"supports": {
	"spacing": {
		"__experimentalSkipSerialization": true,
		"padding": true,
		"blockGap": true
	}
}

Edit

import {
	__experimentalGetSpacingClassesAndStyles as useSpacingProps,
} from '@wordpress/block-editor';

export default function ( { attributes } ) {
	const spacingProps = useSpacingProps( attributes );
	console.log( spacingProps );
}

Input attributes

{
	"style":{
		"spacing":{
			"blockGap":"var:preset|spacing|40",
			"padding":{
				"top":"var:preset|spacing|20",
				"bottom":"var:preset|spacing|20",
				"left":"var:preset|spacing|20",
				"right":"var:preset|spacing|20"
			}
		}
	}
}

Ideal

style: {
	paddingTop: 'var(--wp--preset--spacing--20)',
	paddingRight: 'var(--wp--preset--spacing--20)',
	paddingBottom: 'var(--wp--preset--spacing--20)',
	paddingLeft: 'var(--wp--preset--spacing--20)',
	gap: 'var(--wp--preset--spacing--40)',
}

Actual

style: {
	paddingTop: 'var(--wp--preset--spacing--20)',
	paddingRight: 'var(--wp--preset--spacing--20)',
	paddingBottom: 'var(--wp--preset--spacing--20)',
	paddingLeft: 'var(--wp--preset--spacing--20)',
}

---

Following the code, only padding and margin were imported below.

https://github.com/WordPress/gutenberg/blob/trunk/packages/style-engine/src/styles/spacing/index.ts

Environment info

• WordPress 6.1 RC1
• Gutenberg Plugin 18.7.1 active / deactive

Please confirm that you have searched existing issues in the repo.

Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

Yes