vue3 + elementPlus reset重置表单问题

<template>
  <div class="main">
    <el-form ref="resetFormData" :model="formInline">
      <el-form-item label="姓名" prop="customerName">
        <el-input
          v-model="formInline.customerName"
          placeholder="请输入姓名"
        ></el-input>
      </el-form-item>
      <el-button type="warning" @click="resetForm">重置</el-button>
    </el-form>
  </div>
</template>

<script>
import { defineComponent, Reactive, ref } from "vue";
export default defineComponent({
  setup() {
    const resetFormData = ref(null);
    const formInline = reactive({});
    
    const resetForm = () => {
      resetFormData.value.resetFields();
    };
    return {
      resetForm,
      resetFormData,
      formInline,
    };
  },
});
</script>

// Vue2.0 
Vue.prototype.resetForm = resetForm;
 
//Vue3.0 
let app = createApp(App);
 
//... 
app.config.globalProperties.resetForm = resetForm;