Element UI 重置表单功能

<el-form :model="myForm" ref="myForm">
  <el-form-item label="机构名称:" prop="orgnName" >
   <el-input v-model="myForm.orgnName" auto-complete="off" readonly></el-input>
  </el-form-item>
<el-form-item label="人员角色:" prop="roleId">
 <el-select v-model="myForm.roleId"  placeholder="请选择角色" >
    <el-option v-for="item in roleDroplist" :key="item.id" :label="item.roleName" :value="item.id"></el-option>
 </el-select>
</el-form-item>
<el-form-item label="出生日期:"   prop="birthday">
 <el-date-picker v-model="myForm.birthday" type="date" value-format="yyyy-MM-dd" placeholder="请选择出生日期">
 </el-date-picker>
</el-form-item>
<titleInfo>
    <li>保存信息</li>
</titleInfo>
<div class="btn_bottom">
    <button class="btn search"  @click="save">保存</button>
    <button class="btn repeat"  @click="quit">取消</button>
    <button class="btn repeat"  @click="rest">重置</button>
</div>
</el-form>

//重置
rest() {
  this.$refs.myForm.resetFields();
  // this.$refs[myForm].resetFields()
},