I've created several forms with Drupal 8 directly in admin or with Form API. I've added some client side validation with this jQuery plugin : jQuery Validation Plugin.

Everything works very well. Now my client asked me to open one of these form in a popin. So I've installed this 2 modules : Contact Block (The Contact Block module provides contact forms in a block.) https://www.drupal.org/project/contact_block

I can open form in a popin and it works well but after validation, the page is reloaded and it is not UX friendly since we are in a popin. So I've installed this module : Contact ajax (implements ajax submission for core Contact form in Drupal 8.) https://www.drupal.org/project/contact_ajax

It works well but the submission is done before I can execute client side validation.

The problem seems to be the priority of execution.

I've tried to apply preventDefault on the submit button but it doesn't work.

$( "#form #submit-button" ).click(function( event ) {
  //validation code

I've found this topic but I donc know how to implement the code : How to prevent an Ajax form from submitting

I've also found this topic : https://www.drupal.org/project/clientside_validation

Can you help me to understand how I can block the click event on an Ajaxified form's submit buttons ?


I've tried this module : Clientside Validation and apply this patch 2952233-5.patch

It works, the Ajax submit button is disabled. The solution is based on that answer.

For now it has a bug : the form is validated but I don't see the confirmation message at the end.

Then, I've copied the code from this patch in my project and it works.

1 Answer 1

Drupal.behaviors.myBehavior = {
  attach: function (context, settings) {
    $( "#form #submit-button" ).click(function( event ) {

Can you try like this. This will trigger for every AJAX call.

  • Could you expand on your solution ? How do you implement this code ? I know php and JS but never used Drupal.behaviors Mar 26, 2019 at 12:27
  • This code is similar to $(document).ready().If we write anything inside Drupal. behaviors, it will trigger for every ajax click.drupal.org/docs/8/api/javascript-api/javascript-api-overview read this documentation
    – Rajeev C P
    Mar 26, 2019 at 12:33
  • I've added this code in the js custom file but the submit button is still Ajaxified. Also, I've edited my question. Mar 26, 2019 at 13:33

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