Title: _add_default_theme_supports
Published: February 3, 2022
Last modified: May 20, 2026

---

# _add_default_theme_supports()

## In this article

 * [Description](https://developer.wordpress.org/reference/functions/_add_default_theme_supports/?output_format=md#description)
 * [Source](https://developer.wordpress.org/reference/functions/_add_default_theme_supports/?output_format=md#source)
 * [Related](https://developer.wordpress.org/reference/functions/_add_default_theme_supports/?output_format=md#related)
 * [Changelog](https://developer.wordpress.org/reference/functions/_add_default_theme_supports/?output_format=md#changelog)

[ Back to top](https://developer.wordpress.org/reference/functions/_add_default_theme_supports/?output_format=md#wp--skip-link--target)

This function’s access is marked private. This means it is not intended for use 
by plugin or theme developers, only by core. It is listed here for completeness.

Adds default theme supports for block themes when the ‘after_setup_theme’ action
fires.

## 󠀁[Description](https://developer.wordpress.org/reference/functions/_add_default_theme_supports/?output_format=md#description)󠁿

See [‘after_setup_theme’](https://developer.wordpress.org/reference/hooks/after_setup_theme/).

## 󠀁[Source](https://developer.wordpress.org/reference/functions/_add_default_theme_supports/?output_format=md#source)󠁿

    ```php
    function _add_default_theme_supports() {
    	if ( ! wp_is_block_theme() ) {
    		return;
    	}

    	add_theme_support( 'post-thumbnails' );
    	add_theme_support( 'responsive-embeds' );
    	add_theme_support( 'editor-styles' );
    	/*
    	 * Makes block themes support HTML5 by default for the comment block and search form
    	 * (which use default template functions) and `` and `` shortcodes.
    	 * Other blocks contain their own HTML5 markup.
    	 */
    	add_theme_support( 'html5', array( 'comment-form', 'comment-list', 'search-form', 'gallery', 'caption', 'style', 'script' ) );
    	add_theme_support( 'automatic-feed-links' );

    	add_filter( 'should_load_separate_core_block_assets', '__return_true' );
    	add_filter( 'should_load_block_assets_on_demand', '__return_true' );

    	/*
    	 * Remove the Customizer's Menus panel when block theme is active.
    	 */
    	add_filter(
    		'customize_panel_active',
    		static function ( $active, WP_Customize_Panel $panel ) {
    			if (
    				'nav_menus' === $panel->id &&
    				! current_theme_supports( 'menus' ) &&
    				! current_theme_supports( 'widgets' )
    			) {
    				$active = false;
    			}
    			return $active;
    		},
    		10,
    		2
    	);
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/theme.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/7.0/src/wp-includes/theme.php#L4386)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/theme.php#L4386-L4423)

## 󠀁[Related](https://developer.wordpress.org/reference/functions/_add_default_theme_supports/?output_format=md#related)󠁿

| Uses | Description | 
| [wp_is_block_theme()](https://developer.wordpress.org/reference/functions/wp_is_block_theme/)`wp-includes/theme.php` |

Returns whether the active theme is a block-based theme or not.

  | 
| [add_theme_support()](https://developer.wordpress.org/reference/functions/add_theme_support/)`wp-includes/theme.php` |

Registers theme support for a given feature.

  | 
| [current_theme_supports()](https://developer.wordpress.org/reference/functions/current_theme_supports/)`wp-includes/theme.php` |

Checks a theme’s support for a given feature.

  | 
| [add_filter()](https://developer.wordpress.org/reference/functions/add_filter/)`wp-includes/plugin.php` |

Adds a callback function to a filter hook.

  |

[Show 2 more](https://developer.wordpress.org/reference/functions/_add_default_theme_supports/?output_format=md#)
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## 󠀁[Changelog](https://developer.wordpress.org/reference/functions/_add_default_theme_supports/?output_format=md#changelog)󠁿

| Version | Description | 
| [5.9.0](https://developer.wordpress.org/reference/since/5.9.0/) | Introduced. |

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