Google Ads Direct Keyword Insertion – Replace Title & H1 with Keyword (JS)

<script>
//Save parameter value in variable
var keyword = ""
var url_string = window.location.href; 
var url = new URL(url_string);
var keyword = url.searchParams.get("keyword");
//console.log(keyword);
 
 
//Replace title
if(keyword !== null && keyword !== '') {
   document.title = keyword;
}else{
console.log("noParamNoTitle");
}
 
//Replace the first H1
if(keyword !== null && keyword !== '') {
document.getElementsByTagName("h1")[0].innerText = keyword;
}else{
console.log("noParamNoHeading");
}
</script>