class DataCommand

Same name and namespace in other branches
  1. 9 core/lib/Drupal/Core/Ajax/DataCommand.php \Drupal\Core\Ajax\DataCommand
  2. 8.9.x core/lib/Drupal/Core/Ajax/DataCommand.php \Drupal\Core\Ajax\DataCommand
  3. 10 core/lib/Drupal/Core/Ajax/DataCommand.php \Drupal\Core\Ajax\DataCommand

An AJAX command for implementing jQuery's data() method.

This instructs the client to attach the name=value pair of data to the selector via jQuery's data cache.

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

Hierarchy

Expanded class hierarchy of DataCommand

Related topics

Ajax API
Overview for Drupal's Ajax API.
3 files declare their use of DataCommand
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
Mock module for Ajax forms testing.
Callbacks.php in core/modules/system/tests/modules/ajax_forms_test/src/Callbacks.php

File

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

Namespace

Drupal\Core\Ajax
View source 
class DataCommand implements CommandInterface {
    
    /**
     * A CSS selector string for elements to which data will be attached.
     *
     * If the command is a response to a request from an #ajax form element then
     * this value can be NULL.
     *
     * @var string
     */
    protected $selector;
    
    /**
     * The key of the data attached to elements matched by the selector.
     *
     * @var string
     */
    protected $name;
    
    /**
     * The value of the data to be attached to elements matched by the selector.
     *
     * The data is not limited to strings; it can be any format.
     *
     * @var mixed
     */
    protected $value;
    
    /**
     * Constructs a DataCommand object.
     *
     * @param string $selector
     *   A CSS selector for the elements to which the data will be attached.
     * @param string $name
     *   The key of the data to be attached to elements matched by the selector.
     * @param mixed $value
     *   The value of the data to be attached to elements matched by the selector.
     */
    public function __construct($selector, $name, $value) {
        $this->selector = $selector;
        $this->name = $name;
        $this->value = $value;
    }
    
    /**
     * Implements Drupal\Core\Ajax\CommandInterface:render().
     */
    public function render() {
        return [
            'command' => 'data',
            'selector' => $this->selector,
            'name' => $this->name,
            'value' => $this->value,
        ];
    }

}

Members

Title Modifiers Object type Summary Overriden Title
DataCommand::$name protected property The key of the data attached to elements matched by the selector.
DataCommand::$selector protected property A CSS selector string for elements to which data will be attached.
DataCommand::$value protected property The value of the data to be attached to elements matched by the selector.
DataCommand::render public function Implements Drupal\Core\Ajax\CommandInterface:render(). Overrides CommandInterface::render
DataCommand::__construct public function Constructs a DataCommand object.

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