typia/src/internal/_isFormatEmail.ts

Superfast runtime validators with only one line

export const _isFormatEmail = (str: string): boolean => PATTERN.test(str);

const PATTERN =
  /^[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?$/i;