text: /**
   * Check if the given character code, or the character code at the first
   * character, is hexadecimal.
   *
   * @param {string|number} character
   * @returns {boolean} Whether `character` is hexadecimal
   */
  export function isHexadecimal(character) {
    var code = typeof character === 'string' ? character.charCodeAt(0) : character
  
    return (
      (code >= 97 /* a */ && code <= 102) /* z */ ||
      (code >= 65 /* A */ && code <= 70) /* Z */ ||
      (code >= 48 /* A */ && code <= 57) /* Z */
    )
  }
  