将具有数组值的对象键转换为查询字符串

function objectToQueryString(obj) {
  let queryString = '';
  for (let key in obj) {
    if (Array.isArray(obj[key])) {
      obj[key].forEach(value => {
        queryString += `${encodeURIComponent(key)}=${encodeURIComponent(value)}&`;
      });
    } else {
      queryString += `${encodeURIComponent(key)}=${encodeURIComponent(obj[key])}&`;
    }
  }
  return queryString.slice(0, -1); // 去除最后一个多余的"&"符号
}

const obj = {
  name: 'John',
  age: 25,
  hobbies: ['reading', 'coding', 'gaming']
};

const queryString = objectToQueryString(obj);
console.log(queryString);

const qs = require('qs');

const obj = {
  name: 'John',
  age: 25,
  hobbies: ['reading', 'coding', 'gaming']
};

const queryString = qs.stringify(obj);
console.log(queryString);

const obj = {
  name: 'John',
  age: 25,
  hobbies: ['reading', 'coding', 'gaming']
};

const params = new URLSearchParams(obj);
const queryString = params.toString();
console.log(queryString);