创建vue项目:

vue init webpack vee

cd ./vee 

npm run dev
 
# or
yarn run dev

安装 VeeValidate

npm install vee-validate --save
# or
yarn add  vee-validate --save

本文中使用的 VeeValidate 版本为 2.1.5

在 App.vue 中引入

import VeeValidate from 'vee-validate';

Vue.use(VeeValidate);

例子

第一个测试例子

<template>
  <div class="test1">
    <div>
      <input
        type="text"
        name="nickname"
        v-model="formData.nickname"
        v-validate="'required|min:3|max:10'"
      >
      <p>{{errors.first('nickname')}}</p>
    </div>
    <div>
      <button @click="handleSubmit">Submit</button>
    </div>
  </div>
</template>

<script>
  export default {
    name: "test1",
    data() {
      return {
        formData: {
          nickname: '',
          password: '',
        }
      }
    },
    methods: {
      handleSubmit() {
        this.$validator.validate()
          .then((valid) => {
            if (true === valid) {
              console.log('验证通过');
            } else {
              console.log(this.$validator.errors.all());
            }
          })
      }
    }
  }
</script>

<style scoped lang="css">
  .test1 {
    width: 900px;
    margin: 0 auto;
  }
</style>

更多配置请参考官网! 我们只是用些常用配置和常用的验证!

中文配置

全局配置

import VeeValidate, {Validator} from 'vee-validate';
import zh_CN from 'vee-validate/dist/locale/zh_CN';
Vue.use(VeeValidate, {
  dictionary: {
    zh_CN: zh_CN
  }
});
Validator.localize('zh_CN');

这样就可以使用中文提示了!

自定义错误提示

<template>
  <div class="test2">
    <div><input type="text" v-model="formData.nickname" data-vv-name="nickname" v-validate="'required|min:3|max:10'">
    </div>
    <div>{{errors.first('nickname')}}</div>
    <div><input type="text" v-model="formData.password" data-vv-name="password" v-validate="'required|min:5|max:200'">
    </div>
    <div>{{errors.first('password')}}</div>
    <div>
      <button @click="handleSubmit">Submit</button>
    </div>
  </div>
</template>

<script>
  const validate = {
    custom: {
      nickname: {
        required: () => '昵称不得为空', //写法1
        min: "昵称不得小于3个字符", //写法2
        max: () => '昵称不得大于10个字符'
      },
      password: {
        required: () => '密码不得为空',
        min: "密码不得小于5个字符",
        max: () => '密码不得大于200个字符'
      }
    },
  };

  export default {
    name: "test2",
    data() {
      return {
        formData: {
          nickname: '',
          password: '',
        }
      }
    },
    methods: {
      handleSubmit() {
        this.$validator.validate()
          .then((valid) => {
            if (true === valid) {
              console.log('验证通过');
            } else {
              console.log(this.$validator.errors.all());
            }
          })
      }
    },
    mounted() {
      this.$validator.localize('zh_CN', validate);
    }
  }
</script>

自定义验证规则

<template>
  <div class="test2">
    <div><input type="text" v-model="formData.nickname" data-vv-name="nickname" v-validate="'required|min:3|max:10'">
    </div>
    <div>{{errors.first('nickname')}}</div>
    <div><input type="text" v-model="formData.password" data-vv-name="password" v-validate="'required|min:5|max:200'">
    </div>
    <div>{{errors.first('password')}}</div>
    <div><input type="text" v-model="formData.re_password" data-vv-name="re_password"
                v-validate="'required|confirm'">
    </div>
    <div>{{errors.first('re_password')}}</div>
    <div><input type="text" v-model="formData.mobile" data-vv-name="mobile" v-validate="'required|mobile'">
    </div>
    <div>{{errors.first('mobile')}}</div>
    <div>
      <button @click="handleSubmit">Submit</button>
    </div>
  </div>
</template>

<script>
  const validate = {
    custom: {
      nickname: {
        required: () => '昵称不得为空', //写法1
        min: "昵称不得小于3个字符", //写法2
        max: () => '昵称不得大于10个字符'
      },
      password: {
        required: () => '密码不得为空',
        min: "密码不得小于5个字符",
        max: () => '密码不得大于200个字符'
      },
      re_password: {
        required: () => '请再次输入密码!',
      },
      mobile: {
        required: () => '请输入手机号码!',
      }
    },
  };

  export default {
    name: "test3",
    data() {
      return {
        formData: {
          nickname: '',
          password: '',
          re_password: '',
          mobile: ''
        }
      }
    },
    methods: {
      handleSubmit() {
        this.$validator.validate()
          .then((valid) => {
            if (true === valid) {
              console.log('验证通过');
            } else {
              console.log(this.$validator.errors.all());
            }
          })
      }
    },
    mounted() {
      this.$validator.localize('zh_CN', validate);
      this.$validator.extend('mobile', {
        getMessage: field => '手机号有误',
        validate: value => {
          return /^((13|14|15|17|18)[0-9]{1}d{8})$/.test(value)
        }
      })
      this.$validator.extend('confirm', {
        getMessage: field => '两次密码输入不一致',
        validate: value => {
          return value === this.formData.password
        }
      })
    }
  }
</script>

显示第一个错误!

有时候我们需要在弹出层中提示用户所以要显示第一个错误

this.$validator.errors.items[0].msg

例子发验证码和注册!

这个例子中发验证码是一个验证注册又是一个验证所以有点意义! 在发送验证码的时候需要验证手机号码和图形验证码注册的时候需要验证除图形验证码之外的数据

template

<template>
  <div class="reg">
    <div class="form_item">
      <div class="input">
        <input
          type="text"
          name="mobile"
          data-vv-name="mobile"
          v-model="mobile"
          v-validate="'required|mobile'"
          placeholder="手机号码"
        >
      </div>
      <div class="err">{{errors.first('mobile')}}</div>
    </div>
    <div class="form_item">
      <div class="input">
        <input
          type="text"
          v-model="img_captcha"
          name="img_captcha"
          placeholder="图形验证码"
          v-validate="'required'"
        >
      </div>
      <div class="err">{{errors.first('img_captcha')}}</div>
    </div>
    <div class="form_item">
      <div class="input send_sms">
        <input
          type="text"
          v-validate="'required|length:6'"
          v-model="sms_captcha"
          name="sms_captcha"
          placeholder="短信验证码"
        >
        <button class="send_sms_btn" @click="handleSendSms">获取验证码</button>
      </div>
      <div class="err">{{errors.first('sms_captcha')}}</div>
    </div>
    <div class="form_item">
      <div class="input">
        <input
          type="text"
          name="password"
          v-validate="'required|min:8'"
          v-model="password"
          placeholder="登录密码"
          ref="password"
        >
      </div>
      <div class="err">{{errors.first('password')}}</div>
    </div>
    <div class="form_item">
      <div class="input">
        <input
          type="text"
          name="re_password"
          v-validate="'required|confirmed:password'"
          v-model="re_password"
          placeholder="再次输入登录密码"
        ></div>
      <div class="err">{{errors.first('re_password')}}</div>
    </div>
    <div class="form_item">
      <div class="input">
        <input
          type="text"
          name="nickname"
          v-validate="'required|min:3|max:10'"
          v-model="nickname"
          placeholder="请输入昵称"
        ></div>
      <div class="err">{{errors.first('nickname')}}</div>
    </div>
    <div class="form_item">
      <div class="input">
        <input
          type="text"
          name="id_card"
          v-validate="'required|id_card'"
          v-model="id_card"
          placeholder="请输入身份证号码"
        ></div>
      <div class="err">{{errors.first('id_card')}}</div>
    </div>
    <div class="form_item">
      <div class="input">
        <input
          type="date"
          name="birthday"
          v-validate="'required|date_format:YYYY-MM-DD'"
          v-model="birthday"
          placeholder="请输入生日"
        ></div>
      <div class="err">{{errors.first('birthday')}}</div>
    </div>
    <div class="form_item">
      <div class="input">
        <input
          type="text"
          name="url"
          v-validate="'required|url'"
          v-model="url"
          placeholder="请输入个人网址"
        ></div>
      <div class="err">{{errors.first('url')}}</div>
    </div>
    <div class="form_item">
      <div class="input">
        <input
          type="text"
          name="email"
          v-validate="'required|email'"
          v-model="email"
          placeholder="请输入电子邮箱"
        ></div>
      <div class="err">{{errors.first('email')}}</div>
    </div>
    <div class="form_item">
      <div class="input">
        <input
          type="text"
          name="age"
          v-validate="'required|between:18,60'"
          v-model="age"
          placeholder="请输入年龄"
        ></div>
      <div class="err">{{errors.first('age')}}</div>
    </div>
    <div class="form_item">
      <button class="reg_btn" @click="handleSubmit">注册</button>
    </div>

  </div>
</template>

style 代码(这个是随便写的原生css大家不要吐槽哈)

<style>
  .err {
    color: red;
    font-size: 12px;
    text-align: left;
  }

  .reg {
    width: 500px;
    margin: 0 auto;
  }

  .send_sms {
    position: relative;
  }

  .send_sms_btn {
    position: absolute;
    width: 100px;
    height: 30px;
    right: -11px;
    top: 2px;
    cursor: pointer;
    border: none;
    border-radius: 4px;
    background-color: #e4393c;
    outline: none;
    color: #fff;
  }

  .form_item {
    margin-bottom: 10px;
    width: 400px;
  }

  input {
    width: 400px;
    height: 30px;
    border: 1px solid #999;
    border-radius: 4px;
    outline: none;
    padding-left: 10px;
  }

  .reg_btn {
    width: 100px;
    height: 30px;
    border: none;
    border-radius: 4px;
    background-color: #e4393c;
    outline: none;
    cursor: pointer;
    color: #fff;
  }
</style>

js

<script>
  import {messages} from '../validate/reg'

  export default {
    name: "reg",
    data() {
      return {
        url: '',
        age: '',
        email: '',
        birthday: '',
        id_card: '',
        nickname: '',
        mobile: '',
        img_captcha: '',
        sms_captcha: '',
        password: '',
        re_password: '',
      }
    },
    mounted() {
      this.$validator.localize('zh_CN', messages);
      this.$validator.extend('mobile', {
        getMessage: field => '手机号有误',
        validate: value => {
          return /^((13|14|15|17|18)[0-9]{1}d{8})$/.test(value)
        }
      });
      this.$validator.extend('id_card', {
        getMessage: field => '身份证号码格式有误',
        validate: value => {
          return /(^d{15}$)|(^d{18}$)|(^d{17}(d|X|x)$)/.test(value)
        }
      });
    },
    methods: {
      handleSubmit() {
        this.$validator.errors.clear();
        this.$validator.validateAll({
          mobile: this.mobile,
          password: this.password,
          sms_captcha: this.sms_captcha,
          re_password: this.re_password,
          url: this.url,
          age: this.age,
          email: this.email,
          birthday: this.birthday,
          id_card: this.id_card,
          nickname: this.nickname,
        }).then((valid) => {
          console.log(valid);
          if (true === valid) {
            console.log('验证通过');
          } else {
            console.log(this.$validator.errors.all());
          }
        });
      },
      handleSendSms() {
        this.$validator.errors.clear();
        this.$validator.validateAll({
          mobile: this.mobile,
          img_captcha: this.img_captcha
        }).then((valid) => {
          console.log(valid);
          if (true === valid) {
            console.log('验证通过');
          } else {
            console.log(this.$validator.errors.all());
          }
        });
      }
    }
  }
</script>

外部引入的js (自定义提示内容)

export const messages = {
  custom: {
    mobile: {
      required: () => '请输入手机号码!',
      mobile: () => '手机号码有误',
    },
    img_captcha: {
      required: () => '请输入图形验证码!',
    },
    sms_captcha: {
      required: () => '请输短信验证码!',
      length: () => '短信验证码为6位数字'
    },
    password: {
      required: () => '密码不得为空',
      min: () => '密码不得小于8个字符',
    },
    re_password: {
      required: () => '请再次输入密码!',
      confirmed: () => '两次密码输入不一致'
    },
    nickname: {
      required: () => '请输入昵称',
      min: () => '昵称最小为3位字符',
      max: (field, params) => {
        return `昵称最大为${params[0]}位字符`;
      }
    },
    id_card: {
      required: "身份证号码不得为空"
    },
    birthday: {
      required: "请选择出生日期",
      date_format: "出生日期有误"
    },
    url: {
      required: () => "请输入个人网址",
      url: () => "网址输入有误"
    },
    email: {
      required: () => "请输入电子邮箱",
      email: () => "电子邮箱输入有误"
    },
    age: {
      required: () => "请输入年龄",
      between: () => "年龄必须在18-60岁之间"
    }
  },
};

扩展内容

自定义错误信息中显示配置验证规则中的参数

export const messages = {
  custom: {
    nickname: {
      required: () => "请输入年龄",
      between: (fiield,params) => `年龄必须在${params[0]}-${params[1]}岁之间"
    }
  },
};

规则里面第一个参数是字段名称第二个参数是验证规则后面的参数;

验证指定字段

validateAll(field Object) 
validateAll({mobile:this.moble});

还可以使用 data-vv-scope 来指定但是该方法并不适用一些场景; 显示错误信息的时候必须要指定scope的值不然不会显示错误信息

VeeValidate 的使用场景以及配置