同一页上具有可扩展行的多个Vuetify数据表

如何解决同一页上具有可扩展行的多个Vuetify数据表

我正在将Vuetify的v-data-tables与可扩展的行一起使用。当页面上只有一个v-data-table时，可展开的行工作正常。当我有多个v-data-tables时，可扩展行不再起作用。我以为我缺少使每个数据表或插槽唯一的东西吗？

CodePen：https://codepen.io/tapal/pen/poyOdBw（本质上是Vuetify文档中可扩展的行CodePen，但分为两张表）。

new Vue({
  el: '#app',vuetify: new Vuetify(),data() {
    return {
      expanded: [],singleExpand: false,headers: [{
          text: 'Dessert (100g serving)',align: 'start',sortable: false,value: 'name',},{
          text: 'Calories',value: 'calories'
        },{
          text: 'Fat (g)',value: 'fat'
        },{
          text: 'Carbs (g)',value: 'carbs'
        },{
          text: 'Protein (g)',value: 'protein'
        },{
          text: 'Iron (%)',value: 'iron'
        },{
          text: '',value: 'data-table-expand'
        },],firstDessert: [{
          name: 'Frozen Yogurt',calories: 159,fat: 6.0,carbs: 24,protein: 4.0,iron: '1%',{
          name: 'Ice cream sandwich',calories: 237,fat: 9.0,carbs: 37,protein: 4.3,{
          name: 'Eclair',calories: 262,fat: 16.0,carbs: 23,protein: 6.0,iron: '7%',{
          name: 'Cupcake',calories: 305,fat: 3.7,carbs: 67,iron: '8%',{
          name: 'Gingerbread',calories: 356,carbs: 49,protein: 3.9,iron: '16%',secondDessert: [{
          name: 'Jelly bean',calories: 375,fat: 0.0,carbs: 94,protein: 0.0,iron: '0%',{
          name: 'Lollipop',calories: 392,fat: 0.2,carbs: 98,protein: 0,iron: '2%',{
          name: 'Honeycomb',calories: 408,fat: 3.2,carbs: 87,protein: 6.5,iron: '45%',{
          name: 'Donut',calories: 452,fat: 25.0,carbs: 51,protein: 4.9,iron: '22%',{
          name: 'KitKat',calories: 518,fat: 26.0,carbs: 65,protein: 7,iron: '6%',}
  },})

<link href="https://cdn.jsdelivr.net/npm/vuetify@2.3.10/dist/vuetify.min.css" rel="stylesheet"/>
<script src="https://cdn.jsdelivr.net/npm/vue@2.x/dist/vue.js"></script>
<script src="https://cdn.jsdelivr.net/npm/vuetify@2.3.10/dist/vuetify.min.js"></script>

<div id="app">
  <v-app id="inspire">
    <v-data-table :headers="headers" :items="firstDessert" :single-expand="singleExpand" :expanded.sync="expanded" item-key="name" show-expand class="elevation-1">
      <template v-slot:top>
            <v-toolbar flat>
              <v-toolbar-title>First Dessert</v-toolbar-title>
              <v-spacer></v-spacer>
              <v-switch v-model="singleExpand" label="Single expand" class="mt-2"></v-switch>
            </v-toolbar>
          </template>
      <template v-slot:expanded-item="{ headers,item }">
            <td :colspan="headers.length">More info about {{ item.name }}</td>
          </template>
    </v-data-table>
    <hr />
    <v-data-table :headers="headers" :items="secondDessert" :single-expand="singleExpand" :expanded.sync="expanded" item-key="name" show-expand class="elevation-1">
      <template v-slot:top>
            <v-toolbar flat>
              <v-toolbar-title>Second Dessert</v-toolbar-title>
              <v-spacer></v-spacer>
              <v-switch v-model="singleExpand" label="Single expand" class="mt-2"></v-switch>
            </v-toolbar>
          </template>
      <template v-slot:expanded-item="{ headers,item }">
            <td :colspan="headers.length">More info about {{ item.name }}</td>
          </template>
    </v-data-table>
  </v-app>
</div>