Vue Js Add arrays into an array

<html>
<head>
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
    <div id="app">
        <h3>Vue Js Add arrays into an array</h3>
        <ul>
            <li v-for="(item, index) in myArray" :key="index">
                {{ item }}
            </li>
        </ul>
        <button @click="addArray">Add Array</button>
    </div>
    <script type="module">
        const app = new Vue({
            el: "#app",
            data() {
                return {
                    myArray: [[1, 2], [3, 4]],
                };
            },
            methods: {
                addArray() {
                    this.myArray.push([5, 6]);
                },
            },
        });
    </script>
    <style scoped>
        #app {
            max-width: 600px;
            margin: 0 auto;
            padding: 20px;
            font-family: Arial, sans-serif;
            background-color: #f2f2f2;
            border: 1px solid #ccc;
        }

h3 {
            margin-top: 0;
        }

ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

li {
            margin-bottom: 10px;
        }

button {
            background-color: #4CAF50;
            border: none;
            color: white;
            padding: 10px 20px;
            text-align: center;
            text-decoration: none;
            display: inline-block;
            font-size: 16px;
            margin-top: 10px;
            cursor: pointer;
            border-radius: 5px;
        }

button:hover {
            background-color: #3e8e41;
        }
    </style>
</body>

</html>