once is not a function (identical to 3277218)

Coming back to this issue, I was able to identify how this issue/console error gets triggered.

On my main theme, I have the dependency: - core/jquery.once instead of - core/once.

That means that if we don't explicitly define in the webform_civicrm.libraries.yml that we want the dependency core/once for each js library that we're using, the webform will use the one of the theme (parent), which (in my case) was core/jquery.once.

My personal take on this is that we should enforce the proper dependencies so as to avoid any potential situations like mine, although I don't know how many people continue to use the old dependency core/jquery.once.

Same issue on D8, I had to downgrade to 6.2.1.

D8 has been end of life for a very long time. It is not supported.

Jitendra: could you please have a look at this re: D9?

This seems to happen in webform_civicrm_admin.js and webform_civicrm_options.js. At the bottom of the script it's using })(Drupal, jQuery, once);

I've added:

admin:
  dependencies:
    - core/jquery
    - core/once

to webform_civicrm.libraries.yml as suggested, but didn't seems to help.

Workaround for Drupal 8.x:

1. Add js/once.js into your theme from https://www.drupal.org/project/once → (https://git.drupalcode.org/project/once/-/blob/v1.0.1/src/once.js?ref_ty...).
2. Load it as dependency in your_theme.libraries.yml

global-components:
  js:
    js/custom.js: {}
    js/once.js: {}

It looks like the core/once library was added in https://github.com/colemanw/webform_civicrm/pull/773 already? I cant replicate the console error on my instance.

Also, we have test running on github which i think also captures any console errors.

The test is configured to run against drupal version 9.4, 9.5 & v10 and none of them fails with a js error.

Do you mean its only failing for Drupal 8?

Comment #7 doesn't work. Not only is once.js at the provided URL a module script that requires being loaded as a module, webform_civicrm doesn't even pick it up once it's loaded.