有下一個示例代碼：https://jsfiddle.net/JLLMNCHR/09qtwbL6/96/HTML:<div id="app"><button type="button" v-on:click="displayVal()">Button1</button>  <autocomplete v-model="nombre" :items="[ 'Apple', 'Banana', 'Orange', 'Mango', 'Pear', 'Peach', 'Grape', 'Tangerine', 'Pineapple']" /><button type="button" v-on:click="displayVal()">Button2</button></div><script type="text/x-template" id="autocomplete">  <div class="autocomplete">    <input type="text" @input="onChange" v-model="search" @keyup.down="onArrowDown" @keyup.up="onArrowUp" @keyup.enter="onEnter" />    <ul id="autocomplete-results" v-show="isOpen" class="autocomplete-results">      <li class="loading" v-if="isLoading">        Loading results...      </li>      <li v-else v-for="(result, i) in results" :key="i" @click="setResult(result)" class="autocomplete-result" :class="{ 'is-active': i === arrowCounter }">        {{ result }}      </li>    </ul>  </div></script>CSS：#app {  font-family: "Avenir", Helvetica, Arial, sans-serif;  -webkit-font-smoothing: antialiased;  -moz-osx-font-smoothing: grayscale;  color: #2c3e50;  margin-top: 60px;}.autocomplete {  position: relative;  width: 130px;}.autocomplete-results {  padding: 0;  margin: 0;  border: 1px solid #eeeeee;  height: 120px;  overflow: auto;  width: 100%;}.autocomplete-result {  list-style: none;  text-align: left;  padding: 4px 2px;  cursor: pointer;}.autocomplete-result.is-active,.autocomplete-result:hover {  background-color: #4aae9b;  color: white;}我想問你我必須做些什么才能實現 displayVal 在自動完成中顯示選定的值，或者用戶在字段中寫入的值，以防它不在列表中。另外應該怎樣做才能讓 Button2 也顯示出來？