如何在javascript中给url添加参数？

function addParamToUrl(url, paramKey, paramValue) {
  if (url.indexOf('?') !== -1) {
    url += '&' + paramKey + '=' + paramValue;
  } else {
    url += '?' + paramKey + '=' + paramValue;
  }
  return url;
}

// 示例用法
var originalUrl = 'https://example.com';
var paramKey = 'name';
var paramValue = 'John';
var modifiedUrl = addParamToUrl(originalUrl, paramKey, paramValue);
console.log(modifiedUrl); // 输出：https://example.com?name=John

function addParamToUrl(url, paramKey, paramValue) {
  var searchParams = new URLSearchParams(url.search);
  searchParams.append(paramKey, paramValue);
  url.search = searchParams.toString();
  return url.toString();
}

// 示例用法
var originalUrl = new URL('https://example.com');
var paramKey = 'name';
var paramValue = 'John';
var modifiedUrl = addParamToUrl(originalUrl, paramKey, paramValue);
console.log(modifiedUrl); // 输出：https://example.com?name=John

function addParamToUrl(url, paramKey, paramValue) {
  var regex = new RegExp('([?&])' + paramKey + '=.*?(&|$)', 'i');
  if (url.match(regex)) {
    url = url.replace(regex, '$1' + paramKey + '=' + paramValue + '$2');
  } else {
    url += (url.indexOf('?') === -1 ? '?' : '&') + paramKey + '=' + paramValue;
  }
  return url;
}

// 示例用法
var originalUrl = 'https://example.com?name=Jane';
var paramKey = 'name';
var paramValue = 'John';
var modifiedUrl = addParamToUrl(originalUrl, paramKey, paramValue);
console.log(modifiedUrl); // 输出：https://example.com?name=John