code: function getTagState(string) {
    for (let i = string.length - 1; i >= 0; i--) {
      const char = string[i];
  
      if (char === '>') {
        return 0;
      } else if (char === '<') {
        return 1;
      }
    }
  
    return -1;
  }
docs: Determine if 'string' terminates with an opened or closed tag.
  
  Iterating through all characters has at worst a time complexity of O(n),
  and is better than the alternative (using "indexOf/lastIndexOf") which is potentially O(2n).
  
  @param { string } string
  @returns { number } - returns "-1" if no tag, "0" if closed tag, or "1" if open tag