code: function directiveNormalize(name) {
        return name
          .replace(PREFIX_REGEXP, '')
          .replace(SPECIAL_CHARS_REGEXP, function(_, separator, letter, offset) {
            return offset ? letter.toUpperCase() : letter;
          });
      }
docs: Converts snake_case to camelCase.
  Also there is special case for Moz prefix starting with upper case letter.
  @param name Name to normalize