wiki.techinc.nl/includes/htmlform/HTMLFormElement.php

<?php

namespace MediaWiki\HTMLForm;

/**
 * Allows custom data specific to HTMLFormField to be set for OOUI forms. A matching JS widget
 * (defined in htmlform.Element.js) picks up the extra config when constructed using OO.ui.infuse().
 *
 * Currently only supports passing 'hide-if' and 'disable-if' data.
 * @phan-file-suppress PhanUndeclaredMethod
 *
 * @stable to extend
 */
trait HTMLFormElement {

	/** @var array|null */
	protected $condState = null;
	/** @var array|null */
	protected $modules = null;

	public function initializeHTMLFormElement( array $config = [] ) {
		// Properties
		$this->condState = $config['condState'] ?? [];
		$this->modules = $config['modules'] ?? [];

		// Initialization
		if ( $this->modules ) {
			// JS code must be able to read this before infusing (before OOUI is even loaded),
			// so we put this in a separate attribute (not with the rest of the config).
			// And it's not needed anymore after infusing, so we don't put it in JS config at all.
			$this->setAttributes( [ 'data-mw-modules' => implode( ',', $this->modules ) ] );
		}
		$this->registerConfigCallback( function ( &$config ) {
			if ( $this->condState ) {
				$config['condState'] = $this->condState;
			}
		} );
	}
}

/** @deprecated class alias since 1.42 */
class_alias( HTMLFormElement::class, 'HTMLFormElement' );