wp-includes/class-wp-block-supports.php:175Generates a string of attributes by applying to the current block being rendered all of the features that the block supports.
$extra_attributesstring[]optionalarray()stringfunction get_block_wrapper_attributes( $extra_attributes = array() ) { $new_attributes = WP_Block_Supports::get_instance()->apply_block_supports(); if ( empty( $new_attributes ) && empty( $extra_attributes ) ) { return ''; } // This is hardcoded on purpose. // We only support a fixed list of attributes. $attributes_to_merge = array( 'style', 'class', 'id' ); $attributes = array(); foreach ( $attributes_to_merge as $attribute_name ) { if ( empty( $new_attributes[ $attribute_name ] ) && empty( $extra_attributes[ $attribute_name ] ) ) { continue; } if ( empty( $new_attributes[ $attribute_name ] ) ) { $attributes[ $attribute_name ] = $extra_attributes[ $attribute_name ]; continue; } if ( empty( $extra_attributes[ $attribute_name ] ) ) { $attributes[ $attribute_name ] = $new_attributes[ $attribute_name ]; continue; } $attributes[ $attribute_name ] = $extra_attributes[ $attribute_name ] . ' ' . $new_attributes[ $attribute_name ]; } foreach ( $extra_attributes as $attribute_name => $value ) { if ( ! in_array( $attribute_name, $attributes_to_merge, true ) ) { $attributes[ $attribute_name ] = $value; } } if ( empty( $attributes ) ) { return ''; } $normalized_attributes = array(); foreach ( $attributes as $key => $value ) { $normalized_attributes[] = $key . '="' . esc_attr( $value ) . '"'; } return implode( ' ', $normalized_attributes );}Introduced in 5.6.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-block-supports.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.