Examples

Every field below is live. “Complete” means the expected number of characters is present, not that a date, checksum, card, or identifier is valid. Validate those separately in your application.

Examples that normalize case share these local token definitions:

const uppercaseLetter = {
  match: /[a-z]/i,
  transform: (char: string) => char.toUpperCase(),
}
const uppercaseAlphanumeric = {
  match: /[a-z0-9]/i,
  transform: (char: string) => char.toUpperCase(),
}