const responseURL  = "http://localhost:8088/list/query-list/?aaa=newList&regionDd=12345&user=zhangsan"
// 上面這個字符串，我想獲取到aaa的值是 newList。應該如何實現(xiàn)
function parseUrlParams(url,keyName) {
  const queryString = url.split('?')[1];
  if (!queryString) return undefined;
  const params = {};
  const pairs = queryString.split('&');
  console.log('pairs', pairs)
  for (let pairItem of pairs) {
    const [key, value] = pairItem.split('=');
    params[decodeURIComponent(key)] = decodeURIComponent(value || '');
  }
  return params[keyName];
}

console.log(parseUrlParams(responseURL,'user'))

user = abc test
name= '張三'

const responseURL  = "http://example.com?user=abc%20test&name=%E5%BC%A0%E4%B8%89"
const queryString = responseURL.split('?')[1];
if(queryString){
  const params = new URLSearchParams(queryString);
  // name存在，更改參數(shù)
  params.set('name', '華佗'); 
  // sex不存在，設置新的參數(shù)  
  params.set('sex', '男'); 
  // 刪除user這個參數(shù)
  params.delete('user')
  console.log(22, params)
}

// url還是之前那個參數(shù)
const responseURL  = "http://example.com?user=abc%20test&name=%E5%BC%A0%E4%B8%89"
function parseUrlParams(url) {
  // 分割出查詢參數(shù)部分
  const queryString = url.split('?')[1];
  if (!queryString) return undefined;
 
  // 使用 URLSearchParams 解析參數(shù)
  const params = new URLSearchParams(queryString);
  // 直接獲取 user 參數(shù)值
  return params.get('user'); // 返回 "abc test"
}
console.log(parseUrlParams(responseURL))

const responseURL  = "http://localhost:8088/list/query-list/?aaa=newList&regionDd=12345&user=zhangsan"
function parseUrlParams(url, keyName) {
  try {
    const queryString = url.split('?')[1];
    if (!queryString) return undefined;
    
    // 優(yōu)先使用原生 API
    if (window.URLSearchParams) {
      return new URLSearchParams(queryString).get(keyName);
    }
    // 兼容舊版瀏覽器的解析方案
    const params = {};
    queryString.split('&').forEach(pairItem => {
      const [key, value] = pairItem.split('=');
      params[decodeURIComponent(key)] = decodeURIComponent(value || '');
    });
    return params[keyName];
  } catch (e) {
    console.error('URL 解析失敗:', e);
    return undefined;
  }
}
console.log(parseUrlParams(responseURL, 'aaa'));