Use the document.title property to set the title of the document in JavaScript.
You can try running the following code to implement the document.title property in JavaScript.
Real-time demonstration
<!DOCTYPE html>
<html>
<head>
<title>Demo Title</title>
</head>
<body>
<script>
var x = document.title;
document.write("Our Title: "+x);
</script>
</body>
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