element-plus/docs/examples/cascader/multiple-selection.vue

<template>
  <div class="block">
    <span class="demonstration">Display all tags (default)</span>
    <el-cascader :options="options" :props="props" clearable />
  </div>
  <div class="block">
    <span class="demonstration">Collapse tags</span>
    <el-cascader :options="options" :props="props" collapse-tags clearable />
  </div>
</template>

<script lang="ts">
import { defineComponent, reactive, toRefs } from 'vue'

export default defineComponent({
  setup() {
    const state = reactive({
      props: { multiple: true },
      options: [
        {
          value: 1,
          label: 'Asia',
          children: [
            {
              value: 2,
              label: 'China',
              children: [
                { value: 3, label: 'Beijing' },
                { value: 4, label: 'Shanghai' },
                { value: 5, label: 'Hangzhou' },
              ],
            },
            {
              value: 6,
              label: 'Japan',
              children: [
                { value: 7, label: 'Tokyo' },
                { value: 8, label: 'Osaka' },
                { value: 9, label: 'Kyoto' },
              ],
            },
            {
              value: 10,
              label: 'Korea',
              children: [
                { value: 11, label: 'Seoul' },
                { value: 12, label: 'Busan' },
                { value: 13, label: 'Taegu' },
              ],
            },
          ],
        },
        {
          value: 14,
          label: 'Europe',
          children: [
            {
              value: 15,
              label: 'France',
              children: [
                { value: 16, label: 'Paris' },
                { value: 17, label: 'Marseille' },
                { value: 18, label: 'Lyon' },
              ],
            },
            {
              value: 19,
              label: 'UK',
              children: [
                { value: 20, label: 'London' },
                { value: 21, label: 'Birmingham' },
                { value: 22, label: 'Manchester' },
              ],
            },
          ],
        },
        {
          value: 23,
          label: 'North America',
          children: [
            {
              value: 24,
              label: 'US',
              children: [
                { value: 25, label: 'New York' },
                { value: 26, label: 'Los Angeles' },
                { value: 27, label: 'Washington' },
              ],
            },
            {
              value: 28,
              label: 'Canada',
              children: [
                { value: 29, label: 'Toronto' },
                { value: 30, label: 'Montreal' },
                { value: 31, label: 'Ottawa' },
              ],
            },
          ],
        },
      ],
    })
    return toRefs(state)
  },
})
</script>