index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>ServiceWorker</title>
    <style>
        body {
            margin: 0;
            padding: 0;
        }
    </style>
    <script> 
        navigator.serviceWorker.register('/sw.js', { scope: './' }).then(function(registration) {
            // Registration was successful
            // console.log('ServiceWorker registration successful with scope: ', registration);
        }).catch(function(err) {
            // registration failed :(
            console.log('ServiceWorker registration failed: ', err);
        });
    </script>
</head>
<body>
    <p>测试service worker</p>
    <script src="./axios.js"></script>
</body>
</html>