lzb.editor.BlockEdit.attributesForRender

Filters the attributes sent to the server when the editor renders a block preview.

By default the list holds the values of the registered controls plus a few reserved attributes. Use this filter to add an attribute your own code stores on the block but that is not registered as a control, so the preview can render with it.

Attributes

data.attributes holds every attribute on the block, including the ones left out of attsForRender.

Usage

wp.hooks.addFilter(
  "lzb.editor.BlockEdit.attributesForRender",
  "my.custom.namespace",
  function (attsForRender, data) {
    if (data.lazyBlockData.slug !== "lazyblock/my-block") {
      return attsForRender;
    }
 
    return {
      ...attsForRender,
      myCustomAttribute: data.attributes.myCustomAttribute,
    };
  }
);

This affects the editor preview only. On the front end the block renders through PHP, where lzb/block_render/attributes does the same job.