Reply To: Register block preview image with acf_register_block_type?

• truheart

• April 14, 2021 at 6:27 am

I found a workaround since the above solution wasn’t working for me, and is kind of a pain if using get_fields(). Turns out you don’t need to add any custom data to the preview. Turns out when fetching the preview, WordPress includes the fact that it is a preview within the $_POST params.

So you can just set up the example like this when registering the block

'example'           => [
  'attributes'  => [
    'mode'  => 'preview',
    'data'  => [],
  ]
],

Then when rendering the content check if it is a preview like this

if( ! empty( $_POST['query']['preview'] ) :
  /* Render screenshot for example */
else :
  /* Render HTML for block */
endif;