Vue Js Union of Two array

<html>
<head>
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
    <div id="app">
    <h2>Vue Js Union of Two Arrays of Objects</h2>
    <ul>
        <li v-for="(item, index) in union" :key="index">{{ item.id }} - {{ item.name }}</li>
    </ul>
    </div>
    <script type="module">
        const app = new Vue({
            el: "#app",
            data() {
                return {
                    array1: [
                        { id: 1, name: 'John' },
                        { id: 2, name: 'Mary' },
                        { id: 3, name: 'Tom' }
                    ],
                    array2: [
                        { id: 3, name: 'Tom' },
                        { id: 4, name: 'Lisa' },
                        { id: 5, name: 'Jane' }
                    ],
                    union: []
                }
            },
            mounted() {
                this.getUnion();
            },
            methods: {
                getUnion() {
                    this.union = this.array1.concat(this.array2).filter((item, index, self) => {
                        return index === self.findIndex((t) => (
                            t.id === item.id && t.name === item.name
                        ));
                    });
                }
            }
        })
    </script>
</body>
</html>