element-plus/docs/examples/select/remote-search.vue

<template>
  <div style="display: inline-block; margin-left: 20px">
    <p style="margin-left: 10px">default</p>
    <el-select
      v-model="value"
      multiple
      filterable
      remote
      reserve-keyword
      placeholder="Please enter a keyword"
      :remote-method="remoteMethod"
      :loading="loading"
    >
      <el-option
        v-for="item in options"
        :key="item.value"
        :label="item.label"
        :value="item.value"
      />
    </el-select>
  </div>
  <div style="display: inline-block; margin-left: 20px">
    <p style="margin-left: 10px">use remote-show-suffix</p>
    <el-select
      v-model="value"
      multiple
      filterable
      remote
      reserve-keyword
      placeholder="Please enter a keyword"
      remote-show-suffix
      :remote-method="remoteMethod"
      :loading="loading"
    >
      <el-option
        v-for="item in options"
        :key="item.value"
        :label="item.label"
        :value="item.value"
      />
    </el-select>
  </div>
</template>

<script lang="ts" setup>
import { onMounted, ref } from 'vue'

interface ListItem {
  value: string
  label: string
}

const list = ref<ListItem[]>([])
const options = ref<ListItem[]>([])
const value = ref<string[]>([])
const loading = ref(false)

onMounted(() => {
  list.value = states.map((item) => {
    return { value: `value:${item}`, label: `label:${item}` }
  })
})

const remoteMethod = (query: string) => {
  if (query) {
    loading.value = true
    setTimeout(() => {
      loading.value = false
      options.value = list.value.filter((item) => {
        return item.label.toLowerCase().includes(query.toLowerCase())
      })
    }, 200)
  } else {
    options.value = []
  }
}

const states = [
  'Alabama',
  'Alaska',
  'Arizona',
  'Arkansas',
  'California',
  'Colorado',
  'Connecticut',
  'Delaware',
  'Florida',
  'Georgia',
  'Hawaii',
  'Idaho',
  'Illinois',
  'Indiana',
  'Iowa',
  'Kansas',
  'Kentucky',
  'Louisiana',
  'Maine',
  'Maryland',
  'Massachusetts',
  'Michigan',
  'Minnesota',
  'Mississippi',
  'Missouri',
  'Montana',
  'Nebraska',
  'Nevada',
  'New Hampshire',
  'New Jersey',
  'New Mexico',
  'New York',
  'North Carolina',
  'North Dakota',
  'Ohio',
  'Oklahoma',
  'Oregon',
  'Pennsylvania',
  'Rhode Island',
  'South Carolina',
  'South Dakota',
  'Tennessee',
  'Texas',
  'Utah',
  'Vermont',
  'Virginia',
  'Washington',
  'West Virginia',
  'Wisconsin',
  'Wyoming',
]
</script>