element-plus/docs/examples/autocomplete/autocomplete.vue

<template>
  <el-row class="demo-autocomplete">
    <el-col :span="12">
      <div class="sub-title my-2 text-sm text-gray-600">
        list suggestions when activated
      </div>
      <el-autocomplete
        v-model="state1"
        :fetch-suggestions="querySearch"
        clearable
        class="inline-input w-50"
        placeholder="Please Input"
        @select="handleSelect"
      />
    </el-col>
    <el-col :span="12">
      <div class="sub-title my-2 text-sm text-gray-600">
        list suggestions on input
      </div>
      <el-autocomplete
        v-model="state2"
        :fetch-suggestions="querySearch"
        :trigger-on-focus="false"
        clearable
        class="inline-input w-50"
        placeholder="Please Input"
        @select="handleSelect"
      />
    </el-col>
  </el-row>
</template>

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

interface RestaurantItem {
  value: string
  link: string
}

const state1 = ref('')
const state2 = ref('')

const restaurants = ref<RestaurantItem[]>([])
const querySearch = (queryString: string, cb: any) => {
  const results = queryString
    ? restaurants.value.filter(createFilter(queryString))
    : restaurants.value
  // call callback function to return suggestions
  cb(results)
}
const createFilter = (queryString: string) => {
  return (restaurant: RestaurantItem) => {
    return (
      restaurant.value.toLowerCase().indexOf(queryString.toLowerCase()) === 0
    )
  }
}
const loadAll = () => {
  return [
    { value: 'vue', link: 'https://github.com/vuejs/vue' },
    { value: 'element', link: 'https://github.com/ElemeFE/element' },
    { value: 'cooking', link: 'https://github.com/ElemeFE/cooking' },
    { value: 'mint-ui', link: 'https://github.com/ElemeFE/mint-ui' },
    { value: 'vuex', link: 'https://github.com/vuejs/vuex' },
    { value: 'vue-router', link: 'https://github.com/vuejs/vue-router' },
    { value: 'babel', link: 'https://github.com/babel/babel' },
  ]
}

const handleSelect = (item: RestaurantItem) => {
  console.log(item)
}

onMounted(() => {
  restaurants.value = loadAll()
})
</script>