Vue Add Item to Object

<!DOCTYPE html>
<html>
<head>
    <script src="https://unpkg.com/vue@3/dist/vue.global.js"></script>
</head>
<body>
    <div id="app">
        <h3>Vue Add item to Object</h3>
        <input v-model="newItem.id" type="text" placeholder="Enter ID" />
        <input v-model="newItem.name" type="text" placeholder="Enter Name" />
        <button @click="addItem">Add Item</button>
        <ul>
            <li v-for="(item, index) in items" :key="index">{{ item.id }}: {{ item.name }}</li>
        </ul>
    </div>
    <script type="module">
        const app = Vue.createApp({
            data() {
                return {
                    items: [],
                    newItem: {
                        id: "",
                        name: "",
                    },
                };
            },
            methods: {
                addItem() {
                    if (this.newItem.id !== "" && this.newItem.name !== "") {
                        this.items.push({
                            id: this.newItem.id,
                            name: this.newItem.name,
                        });
                        this.newItem.id = "";
                        this.newItem.name = "";
                    }
                },
            },
        });app.mount("#app");
    </script>
    <style scoped>
        /* Set default font family and size */
        body {
            font-family: Arial, sans-serif;
            font-size: 14px;
        }

/* Center the container */
        #app {
            margin: 0 auto;
            max-width: 500px;
        }

/* Style the input fields */
        input[type="text"] {
            padding: 10px;
            margin-bottom: 10px;
            border: 1px solid #ccc;
            border-radius: 4px;
            width: 100%;
        }

/* Style the button */
        button {
            background-color: #4CAF50;
            border: none;
            color: white;
            padding: 10px;
            text-align: center;
            text-decoration: none;
            display: inline-block;
            font-size: 16px;
            margin-bottom: 10px;
            border-radius: 4px;
            cursor: pointer;
        }

/* Style the list items */
        li {
            list-style: none;
            padding: 10px;
            background-color: #f2f2f2;
            margin-bottom: 5px;
            border-radius: 4px;
        }

/* Style the list item ID */
        li span {
            font-weight: bold;
        }
    </style>
</body>
</html>