console.log('test')
<html>
<body>
<button>test</button>
</body>
<script src="https://cdnjs.cloudflare.com/ajax/libs/proj4js/2.8.0/proj4.js" integrity="sha512-ha3Is9IgbEyIInSb+4S6IlEwpimz00N5J/dVLQFKhePkZ/HywIbxLeEu5w+hRjVBpbujTogNyT311tluwemy9w==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
</html>