navbar.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">
    <title>Document</title>
    <script src="https://kit.fontawesome.com/4cb1a40bcb.js" crossorigin="anonymous"></script>
    <link rel="stylesheet" href="./styles/navbar.css">
</head>
<body>
    <div id="navbar">
       
    </div>
    <div id="mainfooter">
        
    </div>
</body>
</html>

<script type="module">
    import { navbar,footer } from "./components/navbar.js"
    let nav= document.getElementById("navbar").innerHTML=navbar()
    let foot= document.getElementById("mainfooter").innerHTML=footer()
</script>
<script src="./script/navbaar.js"></script>