Html js interaction
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title> example html file </title>
<!-- import the src as plain text -->
<script type="text/javascript" src="..."> </script>
</head>
<body>
<button onclick="custom_func()" id="button"> Button </button>
<!-- import the src as a module -->
<script type="module" src="..."> </script>
</body>
</html>
function custom_func () {
// use global object `document` to access the DOM
let button = document.getElementById('button');
button.disabled = true;
}
// to use it in html, bind it to global object `window`.
window.custom_func = custom_func;