从查询字符串中删除一个参数，而不使用正则表达式

function removeQueryParam(queryString, param) {
  const urlParams = new URLSearchParams(queryString);

  // 删除目标参数
  urlParams.delete(param);

  // 重新构建查询字符串
  let newQueryString = "";
  urlParams.forEach((value, key) => {
    if (newQueryString !== "") {
      newQueryString += "&";
    }
    newQueryString += `${encodeURIComponent(key)}=${encodeURIComponent(value)}`;
  });

  return newQueryString;
}

// 示例用法
const queryString = "param1=value1&param2=value2&param3=value3";
const paramToRemove = "param2";
const newQueryString = removeQueryParam(queryString, paramToRemove);
console.log(newQueryString); // 输出 "param1=value1&param3=value3"