Vue Js Single Choice Chip Selection from Drop-Down Menu

<html>
<head>
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
    <h3>Vue Js Single Select Chips from Dropdown</h3>
    <div id="app">
        <div class="chip" v-if="selectedItem">
            {{ selectedItem }}
            <span class="close" @click="remove">x</span>
        </div>
        
            <div class="dropdown">
                <div class="selected-item" @click="toggleDropdown">{{ selectedItem }}</div>
                <ul class="dropdown-list" v-show="showDropdown">
                    <li class="dropdown-item" v-for="item in items" @click="selectItem(item)">{{ item }}</li>
                </ul>
            </div>
    </div>
 <script type="module">
        const app = new Vue({
            el: "#app",
            data() {
                return {
                    items: ['HTML', 'CSS', 'React','Vue','Angular','Node','PHP'],
                    selectedItem: 'CSS',
                    showDropdown: false
                }
            },
            methods: {
                toggleDropdown() {
                    this.showDropdown = !this.showDropdown;
                },
                selectItem(item) {
                    this.selectedItem = item;
                    this.showDropdown = false;
                },
                remove() {
                    this.selectedItem = '';
                }
            }
        });
</script>
<style>
    .dropdown {
            position: relative;
        }

.selected-item {
            cursor: pointer;
            padding: 8px 12px;
            border: 1px solid #ccc;
            border-radius: 4px;
        }

.dropdown-list {
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            background-color: #fff;
            border: 1px solid #ccc;
            border-top: none;
            z-index: 1;
            margin:0
        }

.dropdown-item {
            cursor: pointer;
            padding: 8px 12px;
            border-bottom: 1px solid #ccc;
      }

.chip {
            background-color: #ccc;
            color: #fff;
            padding: 4px 8px;
            border-radius: 4px;
            margin-left: 8px;
            display: inline-flex;
            align-items: center;
            margin-bottom:1rem
        }

.close {
            cursor: pointer;
            margin-left: 8px;
        }
    </style>
 </body>
</html>