Element Select 选择器  

本示例以 Vue Element Admin 项目为基础，介绍 Element Select 选择器【远程搜索】

1、/src/views/select.vue

<template>
  <div class="app-container">
    <el-select
      v-model="roleSelect.value"
      multiple
      filterable
      remote
      reserve-keyword
      placeholder="请输入关键词"
      :remote-method="remoteMethod"
      :loading="roleSelect.loading"
    >
      <el-option v-for="item in roleSelect.options" :key="item.value" :label="item.label" :value="item"></el-option>
    </el-select>
  </div>
</template>

<script>
import { getRoles } from "@/api/select";

export default {
  data() {
    return {
      roleSelect: {
        options: [],
        value: [],
        list: [],
        loading: false
      },
      listQuery: {
        page: 1,
        per_page: 50
      }
    };
  },
  mounted() {
    this.getRoleList();
  },
  methods: {
    remoteMethod(query) {
      if (query !== "") {
        this.roleSelect.loading = true;
        setTimeout(() => {
          this.roleSelect.loading = false;
          this.roleSelect.options = this.roleSelect.list.filter(item => {
            return item.label.toLowerCase().indexOf(query.toLowerCase()) > -1;
          });
        }, 200);
      } else {
        this.roleSelect.options = [];
      }
    },
    async getRoleList() {
      getRoles(this.listQuery)
        .then(res => {
          let mapData = res.data.items.map(item => {
            return { value: item.role_code, label: item.role_name };
          });
          this.roleSelect.value = res.data.items[0].role_code; // 设置第一个值为选中状态
          this.roleSelect.options = mapData;
          this.roleSelect.list = mapData;
        })
        .catch(err => {
          console.error(err);
        });
    }
  }
};
</script>

2、/src/api/select.js

import request from '@/utils/request'

export function getRoles(query) {
  return request({
    url: '/v1/roles',
    method: 'get',
    params: query
  })
}

3、服务端 API 接口返回 json 数据

{
  "data": {
    "items": [
      { "role_code": 1,"role_name": "超级管理员" },
      { "role_code": 2,"role_name": "管理员" },
      { "role_code": 3,"role_name": "普通用户" },
      { "role_code": 4,"role_name": "钻石" },
      { "role_code": 5,"role_name": "金牌" },
      { "role_code": 6,"role_name": "银牌" }
    ],
    "total": 6,
    "page_count": 1
  },
  "code": "200",
  "msg": null
}

4、el-select 取值

var data = this.roleSelect.value
// 输出的是一个数组[1,2,3]

5、el-select 赋值

this.roleSelect.value = [1,2,3]

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