index.html

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8" />
        <meta http-equiv="X-UA-Compatible" content="IE=edge" />
        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
        <link rel="stylesheet" href="./src/css/index.css" />
        <script src="/src/js/rem.js"></script>
        <script src="https://cdn.bootcdn.net/ajax/libs/vConsole/3.4.1/vconsole.min.js"></script>
        <script>
            const vconsole = new VConsole();
        </script>
        <title>Document</title>
        <style>
            .container {
                width: 50rem;
                height: 10rem;
                background: pink;
                font-size: 2rem;
            }
        </style>
    </head>
    <body>
        <div class="container">hello world</div>
    </body>
</html>