WP_Block_Type::__construct( string $block_type, array|string $args = array() )



Will populate object properties from the provided arguments.

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See also

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(string) (Required) Block type name including namespace.


(array|string) (Optional) Array or string of arguments for registering a block type. Any arguments may be defined, however the ones described below are supported by default.

  • 'api_version'
    (string) Block API version.
  • 'title'
    (string) Human-readable block type label.
  • 'category'
    (string|null) Block type category classification, used in search interfaces to arrange block types by category.
  • 'parent'
    (array|null) Setting parent lets a block require that it is only available when nested within the specified blocks.
  • 'ancestor'
    (array|null) Setting ancestor makes a block available only inside the specified block types at any position of the ancestor's block subtree.
  • 'icon'
    (string|null) Block type icon.
  • 'description'
    (string) A detailed block type description.
  • 'keywords'
    (string[]) Additional keywords to produce block type as result in search interfaces.
  • 'textdomain'
    (string|null) The translation textdomain.
  • 'styles'
    (array) Alternative block styles.
  • 'variations'
    (array) Block variations.
  • 'supports'
    (array|null) Supported features.
  • 'example'
    (array|null) Structured data for the block preview.
  • 'render_callback'
    (callable|null) Block type render callback.
  • 'attributes'
    (array|null) Block type attributes property schemas.
  • 'uses_context'
    (array) Context values inherited by blocks of this type.
  • 'provides_context'
    (array|null) Context provided by blocks of this type.
  • 'editor_script'
    (string|null) Block type editor only script handle.
  • 'script'
    (string|null) Block type front end and editor script handle.
  • 'view_script'
    (string|null) Block type front end only script handle.
  • 'editor_style'
    (string|null) Block type editor only style handle.
  • 'style'
    (string|null) Block type front end and editor style handle.

Default value: array()

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File: wp-includes/class-wp-block-type.php

	public function __construct( $block_type, $args = array() ) {
		$this->name = $block_type;

		$this->set_props( $args );

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Version Description
6.0.0 Added the ancestor property.
5.9.0 Added the view_script property.
5.8.0 Added the variations property.
5.6.0 Added the api_version property.
5.5.0 Added the title, category, parent, icon, description, keywords, textdomain, styles, supports, example, uses_context, and provides_context properties.
5.0.0 Introduced.

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User Contributed Notes

  1. Skip to note 1 content
    Contributed by Bence Szalai

    The documentation above suggests that $args['script'] and $args['style'] will be loaded for the “front end”, however in fact it is loaded for both the editor and the front end. If you want certain scripts and styles to be loaded in the front end only, you have to independently load those after a conditional check. Unfortunately WP_Block_Type::__construct (and so register_block_type() and register_block_type_from_metadata()) does not support loading scripts or styles exclusively for the front end.

  2. Skip to note 2 content
    Contributed by mwnciau

    Note that the new to 5.9 view_script parameter only loads the script if render_callback is not defined. See /wp-includes/class-wp-block.php:266:

    if ( ! empty( $this->block_type->view_script ) && empty( $this->block_type->render_callback ) ) {
    	wp_enqueue_script( $this->block_type->view_script );

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