[wp-trac] [WordPress Trac] #59462: Blocks: Introduce a way to enqueue view scripts only when needed for interactivity

[WordPress Trac]

#59462: Blocks: Introduce a way to enqueue view scripts only when needed for
interactivity
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 Reporter:  gziolo           |       Owner:  (none)
     Type:  enhancement      |      Status:  assigned
 Priority:  normal           |   Milestone:  6.7
Component:  Editor           |     Version:  6.4
 Severity:  normal           |  Resolution:
 Keywords:  gutenberg-merge  |     Focuses:
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Comment (by westonruter):

 Should the scope here include not just the initial enqueueing of the
 dependent assets (scripts and styles) but also deferring the loading of
 them until they are needed? For example, the view script for the
 lightboxed Image block doesn't need to be loaded until the Image block is
 scrolled into the viewport.

 This is where there is an intersection with lazy-hydration since the
 interactive island doesn't need to be initialized either until the block
 enters the viewport, the same as the scripts aren't needed until the block
 is in the viewport. As I understand, the process would be that once a
 block enters the viewport (1) download the scripts required by the block,
 and then (2) perform hydration.

 This is also related to client-side navigation, as navigating to a page
 with an interactive block would also require its assets to be downloaded
 (but ideally not downloaded immediately but rather delayed until the block
 is in the viewport, especially for view script modules).

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Ticket URL: <https://core.trac.wordpress.org/ticket/59462#comment:14>
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