Question

我正在使用VueJs模板，并且有一个Vuetify数据表，我创建了表头的选择列表。基于选择列表，如果要取消选中任何标题，我想显示和隐藏表格的列，那么它将与隐藏表格一样隐藏在表格中，然后将出现在表格中。选择列表：

<v-select
  v-model="value"
  :items="headers"
  label="Select Item"
  multiple
>
  <template v-slot:selection="{ item, index }">
    <v-chip v-if="index === 0">
      <span>{{ item.text }}</span>
    </v-chip>
    <span
      v-if="index === 1"
      class="grey--text caption"
    >(+{{ value.length - 1 }} others)</span>
  </template>
</v-select>

Codepen

Answer 1

是的，可以仅显示下拉菜单中选定的标题

可工作的Codepen在这里：https://codepen.io/chansv/pen/PooKMNb

<div id="app">
  <v-app id="inspire">
    <v-select
      v-model="value"
      :items="headers"
      label="Select Item"
      multiple
      return-object
    >
      <template v-slot:selection="{ item, index }">
        <v-chip v-if="index === 0">
          <span>{{ item.text }}</span>
        </v-chip>
        <span
          v-if="index === 1"
          class="grey--text caption"
        >(+{{ value.length - 1 }} others)</span>
      </template>
    </v-select>
    <v-data-table
      :headers="selectedHeaders"
      :items="desserts"
      class="elevation-1"
    >
      <template v-slot:item.calories="{ item }">
        <v-chip :color="getColor(item.calories)" dark>
          {{desserts.map(function(x) {return x.id; }).indexOf(item.id)}}
        </v-chip>
      </template>
    </v-data-table>
  </v-app>
</div>

new Vue({
  el: '#app',
  vuetify: new Vuetify(),
  data () {
    return {
      value: [],
      selectedHeaders: [],
      headers: [
        {
          text: 'Dessert (100g serving)',
          align: 'left',
          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' },
      ],
      desserts: [
        {
          id: 3,
          name: 'Frozen Yogurt',
          calories: [237,456,789,789],
          fat: 6.0,
          carbs: 24,
          protein: 4.0,
          iron: '1%',
        },
        {
          id: 83,
          name: 'Ice cream sandwich',
          calories: [237,456,789,789],
          fat: 9.0,
          carbs: 37,
          protein: 4.3,
          iron: '1%',
        },
        {
          id: 11,
          name: 'Eclair',
          calories: 262,
          fat: 16.0,
          carbs: 23,
          protein: 6.0,
          iron: '7%',
        },
        {
          id: 545,
          name: 'Cupcake',
          calories: 305,
          fat: 3.7,
          carbs: 67,
          protein: 4.3,
          iron: '8%',
        },
        {
          id: 909,
          name: 'Gingerbread',
          calories: 356,
          fat: 16.0,
          carbs: 49,
          protein: 3.9,
          iron: '16%',
        },
      ],
    }
  },
  methods: {
    getColor (calories) {
      if (calories > 400) return 'red'
      else if (calories > 200) return 'orange'
      else return 'green'
    },
  },
  watch: {
    value(val) {
      this.selectedHeaders = val;
    }
  },
  created() {
    this.selectedHeaders = this.headers;
  }
})

如何使用v-select列表显示vuetify数据表的隐藏列

1 个答案: