index.html

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8" />
        <title>Webpack App</title>
    </head>
    <body>
        <h1>Hello world!</h1>
        <canvas id="snakeCanvasID" width="405" height="405"></canvas>
        <script>
            if ('serviceWorker' in navigator) {
                window.addEventListener('load', () => {
                    navigator.serviceWorker
                        .register('/sw.js')
                        .then((registration) => {
                            console.log('SW registered: ', registration);
                        })
                        .catch((registrationError) => {
                            console.log('SW registration failed: ', registrationError);
                        });
                });
            }
        </script>
    </body>
</html>