Vue是一款流行的JavaScript框架，具有易用性和高度可定制性。当我们在开发Vue应用程序时，客户端输入必须得到验证以确保数据的完整性和安全性。以下是Vue提供的一些验证技术：

1. 表单验证

<template>
  <form @submit.prevent="submitForm">
    <input type="text" v-model="name">
    <span v-if="!nameValid">请填写名字</span>
    <input type="email" v-model="email">
    <span v-if="!emailValid">请填写电子邮件</span>
    <button :disabled="!formValid">提交</button>
  </form>
</template>

<script>
export default {
  data() {
    return {
      name: '',
      email: ''
    }
  },
  computed: {
    nameValid() {
      return this.name !== '';
    },
    emailValid() {
      return this.email !== '' && this.email.includes('@');
    },
    formValid() {
      return this.nameValid && this.emailValid;
    }
  },
  methods: {
    submitForm() {
      if (this.formValid) {
        // 提交表单数据
      }
    }
  }
}
</script>

2. 自定义指令验证

<template>
  <input type="text" v-model="text" v-validate>
  <span v-if="error">{{ error }}</span>
</template>

<script>
  import { ValidationObserver, ValidationProvider } from 'vee-validate';

  export default {
    components: {
      ValidationObserver,
      ValidationProvider
    },
    data() {
      return {
        text: ''
      }
    }
  }
</script>

3. 钩子函数验证

const validName = (name) => {
  return name !== '';
}

const validEmail = (email) => {
  return email !== '' && email.includes('@');
}

const validForm = (data) => {
  const { name, email } = data;
  return validName(name) && validEmail(email);
}

export default {
  data() {
    return {
      name: '',
      email: ''
    }
  },
  methods: {
    submitForm() {
      const data = { name: this.name, email: this.email };
      if (validForm(data)) {
        // 提交表单数据
      }
    }
  }
}