How to create custom forms in Drupal 8?
Drupal 8 has a great AJAX Form API which includes some tools to create modal dialogs using the jQuery modal library. The Examples module even demonstrates how to create a custom form and display it in a modal window. But what if what you want to do is display an already created form in a modal?
Why do we need modal dialogs in Drupal 8?
Modal dialogs are great and provide a great experience for the end user – they allow for quick display of content in an overlay without navigating to another page. Getting forms to load and render properly in a modal can sometimes be a little tricky, but fortunately, it’s relatively straightforward to implement in Drupal 8.
How to submit a modal form in Drupal?
Alternatively, you can include this as a dependency in your module’s *.info.yml file. And, finally, the star of this example – the modal form itself! For simplicity, the modal form will contain only a “required” checkbox and an AJAX “submit” button. On successful submission, a success message will display.
What does submitmodalformajax do in Drupal 8?
The submitModalFormAjax () AJAX submit callback checks for any errors before displaying the success message. Voilà! And that’s really it! Let’s trigger open that modal window:
How to display forms in modal dialog with Drupal 8?
If you click the link, the form will be displayed in a modal dialog! Drupal will automatically detect that you are sending an AJAX request and will display just the form so you won’t need to worry about removing the rest of the blocks or hiding undesired markup. The last thing missing, is what will happen if the user creates a node?
How to display a node add form in Drupal?
Let’s display the node add form in a modal window. The first thing that we need to do is create a link which will trigger the modal when the user clicks it. The only special things that this link needs to have are a few attributes that will let Drupal know to display the contents of the link in a dialog: