thangman22/index.html

## index.html
<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>Document</title>
</head>

<body>
    <script type="text/javascript">
    if ('serviceWorker' in navigator) {
        navigator.serviceWorker.register('/sw.js').then(function(registration) {

            // Registration was successful
            console.log('ServiceWorker registration successful with scope: ', registration.scope);

        }).catch(function(err) {
            // registration failed :(
            console.log('ServiceWorker registration failed: ', err);
        });
    }
    </script>
</body>

</html>
	<!DOCTYPE html>
	<html lang="en">

	<head>
	<meta charset="UTF-8">
	<title>Document</title>
	</head>

	<body>
	<script type="text/javascript">
	if ('serviceWorker' in navigator) {
	navigator.serviceWorker.register('/sw.js').then(function(registration) {

	// Registration was successful
	console.log('ServiceWorker registration successful with scope: ', registration.scope);

	}).catch(function(err) {
	// registration failed :(
	console.log('ServiceWorker registration failed: ', err);
	});
	}
	</script>
	</body>

	</html>