No styling attributes when you use acf_register_block_type()

• michaeljansse

• September 12, 2024 at 3:31 pm

In my code I use the following function to register my ACF blocks:

acf_register_block_type($args);

$args in this case is an array based on a .json file. I like using this function because with this I am able to modify the array as I like it (e.g. translating title and description).
I also have the following code in my array:

"attributes": {
   "style": {
      "type": "object",
      "default": {
        "color": {
          "background": "var(--wp--preset--color--button-primary-initial-background)"
        },
        "spacing": {
          "margin": {
            "top" : "var(--wp--preset--spacing--30)"
          }
        }
      }
    }
  },

But I found out that the “style” attribute is ‘removed’ (read: not added) by the ACF plugin whenever I use acf_register_block_type(). After some digging I found a function called acf_get_block_type_default_attributes() in the file /advanced-custom-fields-pro/pro/blocks.php on line 310 that completely replaced the ‘attributes’ of my original array.

Unfortunately this function does not contain any hooks (actions/filters) to modify this array. How can I still get the attribute ‘style’ to work with acf_register_block_type()?