code: function convert(opts) {
    let res = '';
  
    // eslint-disable-next-line
    for (const key in opts) {
      if (hasOwn(opts, key)) {
        if (/^expires$/i.test(key)) {
          let expires = opts[key];
  
          if (typeof expires !== 'object') {
            expires += typeof expires === 'number' ? 'D' : '';
            expires = computeExpires(expires);
          }
          res += `;${key}=${expires.toUTCString()}`;
        } else if (/^secure$/.test(key)) {
          if (opts[key]) {
            res += `;${key}`;
          }
        } else {
          res += `;${key}=${opts[key]}`;
        }
      }
    }
  
    if (!hasOwn(opts, 'path')) {
      res += ';path=/';
    }
  
    return res;
  }
docs: Convert an object to a cookie option string.