JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html>
<head>
	<title>Mengubah Attribut Elemen HTML dengan Javascript</title>
</head>
<body>
	<a href="https://google.com" id="myGoogle">Buka Google.com</a>
	<button type="button" onclick="ubah();">Ubah Attribut</button>
	<script type="text/javascript">
		function ubah() {
			var a = document.getElementById('myGoogle');
			a.href = "https://google.co.id";
		}
	</script>
</body>
</html>