从本地a href中提取查询字符串

<a href="https://example.com/search?q=cloud+computing&category=technology">Search</a>

function extractQueryString(link) {
  var queryString = link.split('?')[1]; // 获取问号后面的部分
  var params = queryString.split('&'); // 将参数分割成数组

  var result = {};
  params.forEach(function(param) {
    var keyValue = param.split('=');
    var key = decodeURIComponent(keyValue[0]); // 解码键
    var value = decodeURIComponent(keyValue[1]); // 解码值
    result[key] = value;
  });

  return result;
}

var link = document.querySelector('a').href; // 获取第一个<a>标签的链接
var queryString = extractQueryString(link);
console.log(queryString);

{
  q: "cloud computing",
  category: "technology"
}