To use an email address as the username in a Grav CMS registration form, you'll need to customize the form configuration to set the username field dynamically based on the user's email input. Here's how you can achieve this:

Steps to Use Email as Username in Grav Registration Form

Hide the Username Field: In your registration form configuration, set the username field to be hidden. Stack Overflow

yaml Copy Edit fields:

• name: username type: hidden Set Username from Email: Use the fill process action to assign the email value to the username field.

yaml Copy Edit process:

• fill: username: "{email}" Adjust Username Validation Regex: Grav's default username validation may not accept email formats. To allow email addresses as usernames, update the username_regex in your configuration.

yaml Copy Edit username_regex: '^[^@\s]+@[^@\s]+.[^@\s]+$' This regular expression permits standard email formats.

Ensure Email Field is Required: Make sure the email field is present and required in your form.

yaml Copy Edit fields:

• name: email type: email label: Email validate: required: true

  References

  • Grav Forms Documentation: Frontend Forms
  • Grav Documentation Plugins