Registers the align block attribute and applies alignment CSS classes.

Source: wp-includes/block-supports/align.php
Since: 5.6.0

Support Key

supports.align

When a block declares "align": true (or an array of allowed values) in its supports, this file registers the align attribute and generates the corresponding CSS class.

Registered Attribute

Functions

wp_register_alignment_support()

Registers the align block attribute for block types that support it.

function wp_register_alignment_support( WP_Block_Type $block_type )

Since: 5.6.0
Access: private

Checks block_has_support( $block_type, 'align', false ). If supported, adds the align attribute with type string and an enum of valid alignment values.

wp_apply_alignment_support()

Adds alignment CSS classes to block markup.

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

Since: 5.6.0
Access: private

Returns: Array with class key set to align{value} (e.g. alignwide, alignfull, aligncenter).

Generated CSS Classes

Registration

WP_Block_Supports::get_instance()->register(
    'align',
    array(
        'register_attribute' => 'wp_register_alignment_support',
        'apply'              => 'wp_apply_alignment_support',
    )
);