Is there a JS helper function for adding block comments?

[ivanjeremic]

Does WordPress have a special javascript helper function on NPM maybe that automatically adds these comments to some handwritten HTML?

<!-- wp:group -->
<!-- /wp:group -->
<!-- wp:spacer {"height":50} -->
<!-- wp:paragraph -->
<p>Hey</p>
<!-- /wp:paragraph -->

[stokesman]

I don’t know of anything. You might check out the raw handling part of the blocks API. I'm not at all familiar with it. But for example, in a browser with the WP editor loaded you can run this in dev console

wp.blocks.serialize( wp.blocks.rawHandler({ HTML: '<p>Hi!</p>' }) )

and get:

<!-- wp:paragraph -->
<p>Hi!</p>
<!-- /wp:paragraph -->

I bet it has its limitations but, again, I'm not familiar with it.