초보자를 위한 VUE3 시작하기: Vue.js 구성 요소를 사용하여 드롭다운 메뉴 효과 만들기

npm install vue

<script src="path/to/vue.js"></script>

var app = new Vue({
  el: '#app',
  data: {
    showMenu: false,
    options: [
      {text: 'Option 1', value: '1'},
      {text: 'Option 2', value: '2'},
      {text: 'Option 3', value: '3'}
    ]
  },
  methods: {
    toggleMenu: function() {
      this.showMenu = !this.showMenu;
    },
    selectOption: function(option) {
      console.log(option);
    }
  }
});

Vue.component('dropdown', {
  props: {
    options: {
      type: Array,
      required: true
    },
    showMenu: {
      type: Boolean,
      required: true
    },
    selectOption: {
      type: Function,
      required: true
    }
  },
  template: `
    <div class="dropdown" v-bind:class="{ 'is-active': showMenu }">
      <div class="dropdown-toggle" v-on:click="toggle()">
        <span>Select an option</span>
        <i class="fa fa-angle-down"></i>
      </div>
      <div class="dropdown-menu">
        <ul>
          <li v-for="option in options" v-on:click="select(option)">
            {{ option.text }}
          </li>
        </ul>
      </div>
    </div>
  `,
  methods: {
    toggle: function() {
      this.$emit('toggle');
    },
    select: function(option) {
      this.$emit('select', option);
    }
  }
});

<div id="app">
  <dropdown v-bind:options="options" v-bind:show-menu="showMenu" v-on:toggle="toggleMenu" v-on:select="selectOption"></dropdown>
</div>

.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-toggle {
  cursor: pointer;
  padding: 0.5rem;
  background-color: #fff;
  border: 1px solid #ccc;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  border: 1px solid #ccc;
  background-color: #fff;
  z-index: 1000;
  display: none;
}

.dropdown-menu ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
}

.dropdown-menu li {
  padding: 0.5rem;
  cursor: pointer;
}

.dropdown-menu li:hover {
  background: #f9f9f9;
}