🇬🇧United Kingdom @mashraf

Managed to get it to work by adding required class to the element which is inside the container.

Full webform source:

name:
  '#type': name
  '#title': Name
  '#title__required': true
  '#first__required': true
  '#middle__access': false
  '#last__required': true
  '#suffix__access': false
  '#degree__access': false
address:
  '#type': address
  '#title': Address
  '#address__required': true
  '#city__required': true
  '#state_province__access': false
confirm_email_outside_container_:
  '#type': email_confirm
  '#title': 'Confirm Email (Outside Container)'
  '#required': true
  '#required_error': 'Confirm Email (Outside Container) is required'
  '#confirm__title': 'Confirm Email (Outside Container)'
what_language_badge_would_you_like_:
  '#type': radios
  '#title': 'What language badge would you like?'
  '#options':
    English: English
    Cymraeg: Cymraeg
  '#required': true
  '#required_error': 'This is a required field'
container:
  '#type': container
  '#states':
    visible:
      ':input[name="what_language_badge_would_you_like_"]':
        value: Cymraeg
  email:
    '#type': email_confirm
    '#title': 'Email (inside container)'
    '#required': true
    '#required_error': 'Email address is required'
    '#attributes':
      class:
        - required
    '#confirm__title': 'Confirm your email (inside container)'

I will review the fix and see best options to add this to the module.

Many thanks!

kashaf_ashraf → created an issue.

kashaf_ashraf → created an issue.