数组中的对象转换为查询字符串？

function objectToQueryString(obj) {
  var queryString = '';
  for (var key in obj) {
    if (obj.hasOwnProperty(key)) {
      var value = obj[key];
      if (Array.isArray(value) || typeof value === 'object') {
        value = JSON.stringify(value);
      }
      queryString += encodeURIComponent(key) + '=' + encodeURIComponent(value) + '&';
    }
  }
  // 去除末尾的"&"符号
  queryString = queryString.slice(0, -1);
  return queryString;
}

var arr = [
  { name: 'John', age: 30 },
  { name: 'Jane', age: 25 }
];

var queryString = objectToQueryString(arr);
console.log(queryString);