如何对嵌套查询字符串Javascript进行编码和解析/解码

function encodeNestedQueryString(obj) {
  const params = new URLSearchParams();
  
  for (const key in obj) {
    if (obj.hasOwnProperty(key)) {
      const value = obj[key];
      
      if (typeof value === 'object') {
        params.append(key, JSON.stringify(value));
      } else {
        params.append(key, value);
      }
    }
  }
  
  return params.toString();
}

const nestedQuery = {
  name: 'John',
  age: 30,
  address: {
    street: '123 Main St',
    city: 'New York',
    country: 'USA'
  }
};

const encodedQuery = encodeNestedQueryString(nestedQuery);
console.log(encodedQuery);

function decodeNestedQueryString(queryString) {
  const params = new URLSearchParams(queryString);
  const obj = {};
  
  for (const [key, value] of params.entries()) {
    try {
      obj[key] = JSON.parse(value);
    } catch {
      obj[key] = value;
    }
  }
  
  return obj;
}

const decodedQuery = decodeNestedQueryString(encodedQuery);
console.log(decodedQuery);