WP_Interactivity_API::data_wp_each_processor( WP_Interactivity_API_Directives_Processor $p, string $mode, array $context_stack, array $namespace_stack, array $tag_stack )

Source

				 * If the style attribute value is not empty, it sets it. Otherwise,
				 * it removes it.
				 */
				if ( ! empty( $style_attribute_value ) ) {
					$p->set_attribute( 'style', $style_attribute_value );
				} else {
					$p->remove_attribute( 'style' );
				}
			}
		}
	}
}

/**
 * Merges an individual style property in the `style` attribute of an HTML
 * element, updating or removing the property when necessary.
 *
 * If a property is modified, the old one is removed and the new one is added
 * at the end of the list.
 *
 * @since 6.5.0
 *
 * Example:
 *
 *     merge_style_property( 'color:green;', 'color', 'red' )      => 'color:red;'
 *     merge_style_property( 'background:green;', 'color', 'red' ) => 'background:green;color:red;'
 *     merge_style_property( 'color:green;', 'color', null )       => ''
 *
 * @param string            $style_attribute_value The current style attribute value.
 * @param string            $style_property_name   The style property name to set.
 * @param string|false|null $style_property_value  The value to set for the style property. With false, null or an
 *                                                 empty string, it removes the style property.
 * @return string The new style attribute value after the specified property has been added, updated or removed.
 */
private function merge_style_property( string $style_attribute_value, string $style_property_name, $style_property_value ): string {
	$style_assignments    = explode( ';', $style_attribute_value );
	$result               = array();
	$style_property_value = ! empty( $style_property_value ) ? rtrim( trim( $style_property_value ), ';' ) : null;
	$new_style_property   = $style_property_value ? $style_property_name . ':' . $style_property_value . ';' : '';

	// Generates an array with all the properties but the modified one.
	foreach ( $style_assignments as $style_assignment ) {
		if ( empty( trim( $style_assignment ) ) ) {
			continue;
		}
		list( $name, $value ) = explode( ':', $style_assignment );
		if ( trim( $name ) !== $style_property_name ) {
			$result[] = trim( $name ) . ':' . trim( $value ) . ';';
		}
	}

	// Adds the new/modified property at the end of the list.
	$result[] = $new_style_property;

	return implode( '', $result );
}

/**
 * Processes the `data-wp-text` directive.
 *
 * It updates the inner content of the current HTML element based on the
 * evaluation of its associated reference.
 *
 * @since 6.5.0
 *
 * @param WP_Interactivity_API_Directives_Processor $p               The directives processor instance.
 * @param string                                    $mode            Whether the processing is entering or exiting the tag.
 */
private function data_wp_text_processor( WP_Interactivity_API_Directives_Processor $p, string $mode ) {
	if ( 'enter' === $mode ) {
		$attribute_value = $p->get_attribute( 'data-wp-text' );
		$result          = $this->evaluate( $attribute_value );

		/*
		 * Follows the same logic as Preact in the client and only changes the
		 * content if the value is a string or a number. Otherwise, it removes the
		 * content.
		 */
		if ( is_string( $result ) || is_numeric( $result ) ) {
			$p->set_content_between_balanced_tags( esc_html( $result ) );
		} else {
			$p->set_content_between_balanced_tags( '' );

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