如何将URL中的参数值作为变量插入到Google Analytics代码中？

const urlParams = new URLSearchParams(window.location.search);
const utmSource = urlParams.get('utm_source');
const utmMedium = urlParams.get('utm_medium');

gtag('set', 'dimension1', utmSource);
gtag('set', 'dimension2', utmMedium);

<!-- Google Analytics全局代码 -->
<script async src="https://www.googletagmanager.com/gtag/js?id=GA_TRACKING_ID"></script>
<script>
  window.dataLayer = window.dataLayer || [];
  function gtag() { dataLayer.push(arguments); }
  gtag('js', new Date());

  // 获取URL参数值
  const urlParams = new URLSearchParams(window.location.search);
  const utmSource = urlParams.get('utm_source');
  const utmMedium = urlParams.get('utm_medium');

  // 插入参数值到Google Analytics代码
  gtag('config', 'GA_TRACKING_ID');
  gtag('set', 'dimension1', utmSource);
  gtag('set', 'dimension2', utmMedium);
</script>