Parsing "data-*" attributes

[Lovor01]

Description

It seems that data-* attributes are not parsed by hpq library and consequently not as a block attribute. Given their special nature I can understand that. This is perhaps a known issue, but I want to confirm that.

To clarify more, see below:

Step-by-step reproduction instructions

in blocks.json, block attribute definition

{
...
		"openSelector": {
			"type": "string",
			"source": "attribute",
			"attribute": "data-open-selector"
		},
...
}

result: openSelector attribute is undefined each time and causes This block contains unexpected or invalid content. error, since it is not parsed from the block. I use instead openSelector without "source" and "attribute" instead, so it is written in a block comments, but it would be nice to know if this is known and accepted issue, or bug.

Screenshots, screen recording, code snippet

No response

Environment info

No response

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

[t-hamano]

Thanks for the report.

data-* attributes are also used in core blocks.

Table Block:

gutenberg/packages/block-library/src/table/block.json

Lines 90 to 94 in 5319e96

	"align": {
	"type": "string",
	"source": "attribute",
	"attribute": "data-align"
	},

GalleryBlock:

gutenberg/packages/block-library/src/gallery/block.json

Lines 24 to 48 in 5319e96

	"fullUrl": {
	"type": "string",
	"source": "attribute",
	"selector": "img",
	"attribute": "data-full-url"
	},
	"link": {
	"type": "string",
	"source": "attribute",
	"selector": "img",
	"attribute": "data-link"
	},
	"alt": {
	"type": "string",
	"source": "attribute",
	"selector": "img",
	"attribute": "alt",
	"default": ""
	},
	"id": {
	"type": "string",
	"source": "attribute",
	"selector": "img",
	"attribute": "data-id"
	},

result: openSelector attribute is undefined each time and causes This block contains unexpected or invalid content.

Could you tell us specifically what kind of errors are logged?

[github-actions]

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