Can someone help me with this.
I have looked at other eksampels inkluding: Simple Vue slot example not working
and
Vue not working in a simple example
Here's the HTML code:
<!DOCTYPE html>
<html lang="dk">
<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>Vue app</title>
    <link rel="stylesheet" href="/css/styles.css" />
</head>
<body>
    <div id="app">
        <ul>
            <li v-for="number in numbers">{{ number }}</li>
        </ul>
    </div>
    <script src="https://unpkg.com/vue@3.2.33/dist/vue.global.js"></script>
    <script src="/js/main.js"></script>
</body>
</html>
And the main.js
new Vue({
    el: '#app',
    data: {
        numbers: [1, 10, 100, 1000, 10000],
    },
});
I have tried in Valet and on live server
 
    