关于javascript:如何为url添加参数要确保旧的参数中不含有新加的参数

export function urlAddParams(params) {  let str = '';  let keys = Object.keys(params);  let len = keys.length - 1;  keys.forEach((key, index) => {    str += key + '=' + params[key] + (index < len ? '&' : '');  });  let { origin, pathname, search, hash } = window.location;  search = search === '' ? '?' : search + '&';  return origin + pathname + search + str + hash;}