TWIG template for webform HTML email not been picked up

The template and suggestions are hard to see because the email template is only rendered when an email is sent via \Drupal\webform\Plugin\WebformHandler\EmailWebformHandler::sendMessage

• webform_email_message_html__WEBFORM_ID
• webform_email_message_html__WEBFORM_ID__WEBFORM_HANDLER_PLUGIN_ID
• webform_email_message_html__WEBFORM_ID__WEBFORM_HANDLER_PLUGIN_ID__WEBFORM_HANDLER_ID

Below are the template suggestions for the contact form's notification email.

• webform_email_message_html__contact
• webform_email_message_html__contact__email
• webform_email_message_html__contact__email__email_notification

I think you just need to replace the underscores with dashes in your *.twig.html files.

@see https://www.drupal.org/docs/8/theming/twig/working-with-twig-templates

The email templates variables are very basic. You need to define a template preprocessor to add the submission data to the $variables array.

The below code snippet would allow you to access submission data as {{ data.email }}

/**
 * Prepares variables for HTML email.
 */
function CUSTOM_MODULE_preprocess_webform_email_message_html(&$variables) {
  /** @var \Drupal\webform\WebformSubmissionInterface $webform_submission */
  $webform_submission = $variables['webform_submission'];
  $variable['data'] = $webform_submission->getData();
}

The webform-email-message-html.html.twig template is really for just adding a custom header and footer to any sent email. You might want to consider using the Email handler's custom Twig support.

@see https://drupal.stackexchange.com/questions/256703/webform-module-transla...

I'm struggling with this too; trying to override the default 'webform submitted' email with a twig template. I've selected Twig as the email format and have added just, "This is broken..." to that field.

If my webform name is 'custom_webform' and I've added an email handler to that webform called 'custom_handler', exactly what should my twig file be called?

And, do I need to define this in a hook_theme()? I don't think so.

I'm getting lots of emails telling me that it's broken....

Thanks,

Glenn

@jrockowitz

Re your comment #7, how could I make those submission data items available for use in a node that wanted to display some webform data?

Thanks.

--UPDATE--

I ended up just pushing the webform data into fields on my content type so they become available to the twig file.

Solved for me.

Selected Twig template as the email handler body format, and named my twig file as webform-email-message-html--WEBFORM-ID.html.twig.

@jrockowitz

I have the twig template working but can't get the webform submission data to show in the email.

I've used your code from comment #7, but can't get the data to display in the email; {{ data }} or {{data.field_name }} both show as empty in the rendered email.

Thanks.