docs: function changeCase(str) {
    if (str == null) return '';
    str = String(str);
    str = str.replace(/\./g, 'zzz')
    str = str.replace(/_/g, '-')
    str = str.replace(/([A-Z]+)/g, function (_, $1) {
      return '-' + $1.toLowerCase();
    });
    str = str.replace(/[^a-z-]+/g, '-')
    str = str.replace(/^[-\s]+|[-\s]+$/g, '');
    str = str.replace(/zzz/g, '.');
    return str;
  }