How to Create and Use Custom supports in Gutenberg Blocks

[theaminulai]

Hello Gutenberg Team 👋,

I'm exploring the extensibility of the supports API in Gutenberg and I have a question regarding the creation and usage of custom block supports.

From the documentation (https://developer.wordpress.org/block-editor/reference-guides/block-api/block-supports/), I understand how core-supported features like align, color, or typography work.

However, I want to go a step further and define my own custom support, for example:

supports: { myCustomSupport: true, }

I’d like to:

• Register and hook into this custom support.
• Handle it similarly to how __experimentalBorder or typography is handled internally.
• Access the support value in both the editor and front-end rendering logic.

Could you please guide me on:

• Whether this is currently supported?
• If yes, how can I implement a custom block support handler?
• If no, is this feature being considered for future support?

A code example or reference to any internal implementation would be incredibly helpful.
Thanks for your amazing work on Gutenberg and for making WordPress development so powerful! 🙌
Best regards,
@theaminuli

[Mamaduka]

I think similar types of questions are more suitable for GitHub discussions.