source https://stackoverflow.com/questions/71727647/displaying-url-parameter-values-as-text-in-an-element-on-webpage-question-from
<!-- example url https://exampleurl.com/?birthdate=22091977&pdflink=yourlink123.pdf-->
<html>
<body>
<span id="birthdate"></span>
</br>
<span id="pdflink"></span>
</body>
</html>
<script>
const queryString = window.location.search;
const urlParams = new URLSearchParams(queryString);
const birthdate = urlParams.get('birthdate');
const pdflink = urlParams.get('pdflink');
document.getElementById("birthdate").innerHTML = birthdate;
document.getElementById("pdflink").innerHTML = pdflink;
</script>
