class ChangedCommand in Drupal 9

An AJAX command for marking HTML elements as changed.

This command instructs the client to mark each of the elements matched by the given selector as 'ajax-changed'.

This command is implemented by Drupal.AjaxCommands.prototype.changed() defined in misc/ajax.js.

Hierarchy

• class \Drupal\Core\Ajax\ChangedCommand implements CommandInterface

Related topics

Ajax API

Overview for Drupal's Ajax API.

2 files declare their use of ChangedCommand

AjaxCommandsTest.php in core/tests/Drupal/Tests/Core/Ajax/AjaxCommandsTest.php

ajax_forms_test.module in core/modules/system/tests/modules/ajax_forms_test/ajax_forms_test.module

Simpletest mock module for Ajax forms testing.

File

core/lib/Drupal/Core/Ajax/ChangedCommand.php, line 16

Namespace

Drupal\Core\Ajax

class ChangedCommand implements CommandInterface {

  /**
   * A CSS selector string.
   *
   * If the command is a response to a request from an #ajax form element then
   * this value can be NULL.
   *
   * @var string
   */
  protected $selector;

  /**
   * An optional CSS selector for elements to which asterisks will be appended.
   *
   * @var string
   */
  protected $asterisk;

  /**
   * Constructs a ChangedCommand object.
   *
   * @param string $selector
   *   CSS selector for elements to be marked as changed.
   * @param string $asterisk
   *   CSS selector for elements to which an asterisk will be appended.
   */
  public function __construct($selector, $asterisk = '') {
    $this->selector = $selector;
    $this->asterisk = $asterisk;
  }

  /**
   * Implements Drupal\Core\Ajax\CommandInterface:render().
   */
  public function render() {
    return [
      'command' => 'changed',
      'selector' => $this->selector,
      'asterisk' => $this->asterisk,
    ];
  }

}

Members

Name	Modifiers	Type	Description	Overrides
ChangedCommand::$asterisk	protected	property	An optional CSS selector for elements to which asterisks will be appended.
ChangedCommand::$selector	protected	property	A CSS selector string.
ChangedCommand::render	public	function	Implements Drupal\Core\Ajax\CommandInterface:render(). Overrides CommandInterface::render
ChangedCommand::__construct	public	function	Constructs a ChangedCommand object.