Types of information in Drupal User interface Menu entries, local tasks, and other links Routing API and page controllers Forms Blocks Ajax Storing and retrieving data Entities Fields …

Pressing a key Moving the mouse Ajax responses in forms Forms that use the Drupal Form API (see the Form API topic for more information about forms) can trigger AJAX responses. Here …

See the Form API topic for an overview of forms, form processing, and form arrays. Each form and render element type corresponds to an element plugin class; each of them either extends …

Creating forms Forms are defined as classes that implement the \Drupal\Core\Form\FormInterface and are built using the \Drupal\Core\Form\FormBuilder …

This document provides a programmer's reference to the Drupal Form API. For a brief introduction on how to create forms, see the Form generation guide. For more extensive …

add and edit forms, or default form: Define a class (or two) that extend (s) \Drupal\Core\Entity\EntityForm to provide add and edit forms for your entities. For content …

Expanded class hierarchy of FormStateInterface All classes that implement FormStateInterface See also \Drupal\Core\Form\FormBuilderInterface \Drupal\Core\Form\FormValidatorInterface …

Examples using Forms API. Creating A Drupal Form requires: Creating a class that extends \Drupal\Core\Form\FormBase or \Drupal\Core\Form\ConfigFormBase …

Form generation Describes how to generate and manipulate forms and process form submissions. Hooks Define functions that alter the behavior of Drupal core.

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