Vue Js Change Dynamically Background color

<html>
<head>
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
    <div id="app">
        <div>
            <h1>Vue Js Change Dynamically Background Color </h1>
            <p>Selected color code: {{ selectedColor }}</p>
            <input type="color" v-model="selectedColor">
        </div>
    </div>
    <script type="module">
        const app = new Vue({
            el: "#app",
            data: {
                selectedColor: "#ffffff",
            },
            watch: {
                selectedColor() {
                    document.body.style.backgroundColor = this.selectedColor;
                },
            },
        });
    </script>
    <style scoped>
        body {
            font-family: Arial, sans-serif;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            height: 100vh;
            margin: 0;
            background-color: #f7f7f7;
            transition: background-color 0.5s ease-in-out;
        }

#app {
            max-width: 800px;
            background-color: #fff;
            padding: 20px;
            border-radius: 5px;
            box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
            text-align: center;
        }

h1 {
            font-size: 3rem;
            margin-bottom: 2rem;
            color: #333;
        }

p {
            font-size: 1.2rem;
            margin-bottom: 1rem;
        }

input[type="color"] {
            border: none;
            outline: none;
            width: 100px;
        }
    </style>
</body>
</html>