How to list and re-arrange or manipulate Gutenberg Block Categories in Wordpress

Question

Anyone know how to re-arrange, manipulate the Block Categories in the Gutenberg Editor in Wordpress I can't even return a list of them as you can with the Blocks themselves, all I can find is 'getCategories' which doesn't seem do anything... the new documentation is not great at all.

Answer 1

This did the trick for me to register a custom Guttenberg block and make it the first option in WP Admin editor:

function custom_block_category( $categories ) {
    $custom_block = array(
        'slug'  => 'my-blocks',
        'title' => __( 'My Test Blocks', 'my-blocks' ),
    );

    $categories_sorted = array();
    $categories_sorted[0] = $custom_block;

    foreach ($categories as $category) {
        $categories_sorted[] = $category;
    }

    return $categories_sorted;
}
add_filter( 'block_categories', 'custom_block_category', 10, 2);