elementui---带建议的输入框远程搜索

```javascript
<el-autocomplete
  v-model="state"
  :fetch-suggestions="querySearchAsync"
  placeholder="请输入内容"
  @select="handleSelect"
></el-autocomplete>
<script>
  export default {
    data() {
      return {
        restaurants: [],
        state: '',
        timeout:  null
      };
    },
    methods: {
      querySearchAsync(queryString, cb) {
		axios.get('url').then(res => {
			var restaurants = res.data; // 获取全部信息
			// 自带过滤器匹配（输入）信息
			var results = queryString ? restaurants.filter(this.createStateFilter(queryString)) : restaurants;

			clearTimeout(this.timeout);
			this.timeout = setTimeout(() => {
			  cb(results);
			}, 3000 * Math.random());
		})
      },
	  // 查询输入字符是否存在
      createStateFilter(queryString) {
        return (state) => {
		//这里和elementui组件不一样
		//value可以换成从后端传回的data数组中的键，
		//queryString.toLowerCase()输入的字符在所有返回信息中存在，!==-1代表匹配到了搜索的字符
          return (state.value.toLowerCase().indexOf(queryString.toLowerCase()) !== -1);
        };
      },
      handleSelect(item) {
	  //返回的意见点击选择触发事件
        console.log(item);
      }
    },
    mounted() {
      this.restaurants = this.loadAll();
    }
  };
</script>