Handles padding and margin styles for blocks.

Source: wp-includes/block-supports/spacing.php
Since: 5.8.0

Note: This remains separate from dimensions.php for backwards compatibility, even though both appear under the "Dimensions" panel in the editor.

Support Key

supports.spacing

Registered Attribute

Block Attributes Read

Functions

wp_register_spacing_support()

function wp_register_spacing_support( WP_Block_Type $block_type )

Since: 5.8.0
Access: private

wp_apply_spacing_support()

function wp_apply_spacing_support( WP_Block_Type $block_type, array $block_attributes ): array

Since: 5.8.0
Since: 6.1.0 Implemented the style engine to generate CSS and classnames.
Access: private

Processing:

1. Checks top-level serialization skip for spacing
2. Checks individual support for spacing.padding and spacing.margin
3. Checks individual serialization skip for each
4. Delegates to wp_style_engine_get_styles()

Returns: Array with style containing padding/margin CSS.

Registration

WP_Block_Supports::get_instance()->register(
    'spacing',
    array(
        'register_attribute' => 'wp_register_spacing_support',
        'apply'              => 'wp_apply_spacing_support',
    )
);