cart.html

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<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">
        <title>Tutorial</title>

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        <link rel="stylesheet" href="https://pro.fontawesome.com/releases/v5.10.0/css/all.css" />

        <link rel="stylesheet" href="style.css">
    </head>

    <body>


        <script src="https://cdn.jsdelivr.net/npm/@popperjs/core@2.9.1/dist/umd/popper.min.js"
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    </body>

</html>