wp-includes/block-editor.php:18Returns the list of default categories for block types.
array[]function get_default_block_categories() { return array( array( 'slug' => 'text', 'title' => _x( 'Text', 'block category' ), 'icon' => null, ), array( 'slug' => 'media', 'title' => _x( 'Media', 'block category' ), 'icon' => null, ), array( 'slug' => 'design', 'title' => _x( 'Design', 'block category' ), 'icon' => null, ), array( 'slug' => 'widgets', 'title' => _x( 'Widgets', 'block category' ), 'icon' => null, ), array( 'slug' => 'theme', 'title' => _x( 'Theme', 'block category' ), 'icon' => null, ), array( 'slug' => 'embed', 'title' => _x( 'Embeds', 'block category' ), 'icon' => null, ), array( 'slug' => 'reusable', 'title' => _x( 'Patterns', 'block category' ), 'icon' => null, ), );}Introduced in 5.8.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/block-editor.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.