[wp-trac] [WordPress Trac] #64061: Backport: Add block visibility support

[WordPress Trac]

#64061: Backport: Add block visibility support
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 Reporter:  wildworks     |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  General       |    Version:
 Severity:  normal        |   Keywords:
  Focuses:                |
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 Backport for https://github.com/WordPress/gutenberg/pull/71203

 We're adding block support to control block visibility. This support will
 prevent blocks from being rendered on the frontend, i.e., server-side.

 To achieve this, we need to add the `render_block` filter to core.

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Ticket URL: <https://core.trac.wordpress.org/ticket/64061>
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