如何只验证Vee-validate 3.x中的某些字段？

import { extend } from 'vee-validate';
import { required } from 'vee-validate/dist/rules';

extend('required', {
  ...required,
  validate(value, { exclude }) {
    if (exclude) {
      return true; // 不验证该字段
    }
    return required.validate(value);
  },
});

<template>
  <div>
    <input v-model="name" v-validate="'required'" :exclude="excludeName" />
    <button @click="toggleExclude">Toggle Exclude</button>
  </div>
</template>

<script>
export default {
  data() {
    return {
      name: '',
      excludeName: false,
    };
  },
  methods: {
    toggleExclude() {
      this.excludeName = !this.excludeName;
    },
  },
};
</script>