I using the InnerBlocks tag to allow for nested blocks, within my custom block. I am trying to use the 'allowedBlocks' argument to restrict the blocks allowed to only specific ones. However, if I put anything inside the InnerBlocks tag, the block does not load and just spins.

I am using acf_register_block for my block registry, as what we are doing heavily ties in with ACF. I have enabled '__experimental_jsx' => true in all the blocks I am working with.

This works

    <InnerBlocks />

This does not work

    <InnerBlocks allowedBlocks={ 'acf/orange-carousel' } />

It also doesn't work if I pass an array instead of a string for the allowed blocks.

I am using ACF Pro Beta 5.9

Any help is appreciated!

2 Answers 2


A late reply but I thought I would include a snippet that worked for me.

Update $allowed_inner_blocks with your own "block_types" and place the following code inside the parent block template;

<?php $allowed_inner_blocks = ['acf/logos']; ?>
<InnerBlocks allowedBlocks="<?php echo esc_attr(wp_json_encode($allowed_inner_blocks)); ?>" />

Is acf the correct namespace? if so, this should work in your edit function.


return (
    <div className={className}>
            allowedBlocks={ ALLOWED_BLOCKS }
  • Yea it should be, that's what the block is registered as. Also, can you clarify what you mean by "edit function"? Keep in mind I am using ACF to register these blocks. acf_register_block
    – Leathel
    Commented Jun 1, 2020 at 19:06
  • Sorry i missed that. My thought process on this was to use @wordpress/create-block and write a new block, then call your acf block using InnerBlocks there.
    – Garrett
    Commented Jun 2, 2020 at 20:08
  • Interesting, Il give it a try
    – Leathel
    Commented Jun 2, 2020 at 20:57

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