Add HTML Anchors (ID Attribute) to Attributes in Block Parser

[crowinck]

Currently WP_Block_Parser and parse_blocks lists block classes/block styles among a block's attributes (attr), but the id attribute (HTML Anchor) can only be retrieved by parsing the HTML in innerHTML or innerContent, even when it is set by the user in a separate field under the Advanced block settings.

Given that there are more enhancements under discussion for the HTML Anchor (see #26685 ), and it will be important to any TOC features, it seems like the anchor should be included in a blocks listed attributes during parsing for easier php & server-side retrieval.

[talldan]

@crowinck It'd be great if you use the provided issue templates when reporting issues.

[jmesserve]

Any update on this?

[Soean]

@jmesserve No, not yet. You can work on a solution of this issue, if you want.