Vue select custom drop-down option how to change the first item to "Please select" as shown in the figure?

uses HeyUI

<FormItem label="" prop="reference">
        <!-- <input type="text" v-model="resume.reference" :disabled="redisabled"> -->
        <Select 
          v-model="resume.reference" 
          :datas="employeeMap"
          :filterable="true"
          type="key"
          :disabled="redisabled"
          keyName="mobilePhone"
          titleName="employeeName"
          placeholder=""
          optionRender
          >
          <template slot-scope="{item}" slot="item"><div>:{{item.employeeName}}</div><div>:{{item.mobilePhone}}</div></template>
        </Select>
      </FormItem>

Jun.15,2022

just add a data with the same structure to the obtained array. Refer to element-ui-- select-- disable option

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1eaf498-2242.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1eaf498-2242.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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