必填项为空校验，valid第一次为true，再点值为false

引入FormInstance ，校验代码改为以下：

import { ElMessage, FormInstance } from 'element-plus'
const ruleFormRef = ref<FormInstance>()const submitForm = async (formEl: FormInstance | undefined) => {if (!formEl) returnawait formEl.validate((valid, fields) => {if (valid) {// 校验成功} else {console.log('error submit!', fields)}})
}
const resetForm = (formEl: FormInstance | undefined) => {if (!formEl) returnformEl.resetFields()
}