Block Supports Render Hook

[ajlende]

In order to support duotone as a block supports item in Gutenberg, we need a render hook to run and add the duotone SVG filter.

See ​WordPress/gutenberg#26361 to see the current progress on duotone and how this will be used.

Trac ticket: https://core.trac.wordpress.org/ticket/52476#ticket

In conjunction with WordPress/gutenberg#26361 for adding block supports for duotone filters, this adds a render hook for block supports.

[poena]

Hi @ajlende, can this ticket be closed? If I read correctly, this has been solved?

[ajlende]

Duotone was implemented differently than this, so yes it can be closed