Detailed explanation of the use of vue validator (vue-validator)

Official document: http://vuejs.github.io/vue-validator/zh-cn/index.html

github project address: https:// github.com/vuejs/vue-validator

See the official documentation for how to use vue-validator alone. This article is used in combination with vue-router.

Install validator

Do not add a custom validator or a public validator that does not need to be used globally, install the validator in main.js , using the CommonJS module specification, you need to explicitly use Vue.use() to install the validator component.

import Validator from 'vue-validator'
Vue.use(Validator)

When used together with vue-router, verification must be installed before calling router#map, router#start and other instance methods.

To customize the validator, create a js file and install the validator component in the file. For example: validation.js

import Vue from 'vue'
import Validator from 'vue-validator'
Vue.use(Validator)
//自定义验证器

Custom validator

The official api provided is as follows

input[type="text"]
input[type="radio"]
input[type="checkbox"]
input[type="number"]
input[type="password"]
input[type="email"]
input[type="tel"]
input[type="url"]
select
textarea

But the above does not It must meet our needs. At this time, we need to use another global API for registering and obtaining global validators.

Vue.validator( id, [definition] )

Example Define validation.js The content is as follows

import Vue from 'vue'
import Validator from 'vue-validator'
Vue.use(Validator)
//自定义验证器
//添加一个简单的手机号验证 
//匹配0-9之间的数字,并且长度是11位
Vue.validator('tel', function (val) {
  return /^[0-9]{11}$/.test(val)
});
//添加一个密码验证
//匹配6-20位的任何字类字符，包括下划线。与“[A-Za-z0-9_]”等效。
Vue.validator('passw', function (val) {
  return /^(\w){6,20}$/.test(val)
});

Use validator

Validator syntax

<validator name="validation">
  <input type="text" v-model=&#39;comment&#39; id=&#39;comment&#39;
  v-validate:comment="{ minlength: 3, maxlength: 15 }">
    <div>
   <span v-show="$validation.comment.minlength">不得少于3个字符</span>
   <span v-show="$validation.comment.maxlength">不得大于15个字符</span>
    </div>
 </validator>

By default, vue-validator will automatically verify based on the validator and v-validate instructions. However, sometimes we need to turn off automatic verification and trigger verification manually when necessary. If you don't need automatic validation, you can turn off automatic validation through the initial attribute or the v-validate validation rule.

is as follows:

<validator name="validation">
  <input type="text" v-model=&#39;comment&#39; id=&#39;comment&#39; 
  v-validate:comment="{ minlength: 3, maxlength: 15 }"  
  detect-change="off" initial=&#39;off&#39;>
  <div>
 <span v-show="$validation.comment.minlength">不得少于3个字符</span>
 <span v-show="$validation.comment.maxlength">不得大于15个字符</span>
     </div>
</validator>

Terminal command problem

<validator name="test_validator">
  <!-- @invalid：valid的逆 ，表示验证不通过 -->
  <input  @invalid="passwInvalid" @valid="passwok" 
  type="password" v-model=&#39;passw&#39; id=&#39;passw&#39; v-validate:passw="[&#39;passw&#39;]"  
  detect-change="off" initial=&#39;off&#39; placeholder=&#39;请输入密码&#39;>
  <input  @invalid="passwInvalid" @valid="passwok" 
  type="password" v-model=&#39;passw2&#39; id=&#39;passw2&#39; v-validate:passw2="[&#39;passw&#39;]"  
  detect-change="off" initial=&#39;off&#39; placeholder=&#39;请输入密码&#39;>
</validator>
<script>
//若是在main.js中导入  无需再次导入
//此处导入的是上面代码的validation.js
import validator from &#39;../validator/validation&#39;
export default{
    data(){
        return{
            comment:&#39;&#39;,
            passw:&#39;&#39;,
            passw2:&#39;&#39;
        }
    },
    methods:{
        passwInvalid(){
            alert(&#39;只能输入6-20个字母、数字、下划线&#39;);
        },
        passwok(){
            //alert(&#39;验证码符合规范&#39;)
        }
    }
}
</script>

Example: User registration verification

is used A component to display prompt information

toast.vue

<template>
    <div v-show="toastshow" transition="toast" 
    class="toast font-normal">
        {{toasttext}}
    </div>
</template>
<script>
export default{
    props:{
        //是否显示提示
        toastshow:{
            type:Boolean,
              required: false,
            default:function(){
                return false;
            }
        },
      //提示的内容
      toasttext:{
           type:String,
          required: false,
          default:function(){
              return &#39;no message&#39;;
           }
        },
        //显示的时间
        duration: {
            type: Number,
            default:3000,//默认3秒
            required:false
        }        
    },
    ready() {
        
    },
    watch:{
        toastshow(val){
        if (this._timeout) clearTimeout(this._timeout)
          if (val && !!this.duration) {
             this._timeout = setTimeout(()=> 
             this.toastshow = false, this.duration)
            }
        }
    }
}
</script>
<style>
    .toast{
        position:absolute;
        left:50%;
        margin-left:-25%;
        bottom:30px;
        display:block;
        width:200px;
        height:auto;
        text-align:center;
        color:white;
        background-color:rgba(0,0,0,0.5);
        border-radius:10px;
        z-index:10;
        transform:scale(1);
        padding:5px;
    }
    .toast-transition{
        transition: all .3s ease;
    }
    .toast-enter{
        opacity:0;
        transform:scale(0.1);
    }
    .toast-leave{
        opacity:0;
        transform:scale(0.1);
    }
</style>

Registered user: If we need to fill in the mobile phone number and enter the password twice

<template>
   <div class=&#39;register-box&#39;>
   <!-- 组件:用于显示提示信息 -->
   <Toast :toastshow.sync="toastshow" :toasttext="toasttext"></Toast>
   <validator name="validation_register1">
    <div class=&#39;register1&#39;>
    <div class=&#39;pd05&#39;>
   <input @invalid="telonInvalid" initial="off" 
   detect-change="off" v-model="telphone" id="telphone" type="tel" 
   class=&#39;phone-number&#39; v-validate:telphone="[&#39;tel&#39;]"  
   placeholder=&#39;请输入手机号码&#39;>
    </div>
    <div class=&#39;pd05&#39;>
     <input @invalid="passwInvalid" v-model="passw1" initial="off"  
     detect-change="off" id="passw1" type="password" 
     v-validate:passw1="[&#39;passw&#39;]"class=&#39;password-number&#39;placeholder=&#39;请输入密码&#39;>
            </div>
            <div class=&#39;pd05&#39;>
            <input @invalid="passwInvalid" v-model="passw2" 
           initial="off" detect-change="off" id="passw2" type="password"
          v-validate:passw2="[&#39;passw&#39;]" class=&#39;password-number&#39; 
             placeholder=&#39;请输入密码&#39;>
         </div>
    <a class=&#39;greenBtn&#39; v-on:click=&#39;register_user()&#39;>下一步</a>
        </div>
        </validator>
    </div>
</template>
<script>
//导入validation.js  此处的validation.js就是上文中validation.js的内容
import validator from &#39;../validator/validation&#39;;
//导入显示提示信息的组件
import Toast from &#39;../components/toast.vue&#39;;
export default{    
    components: {
        //注册组件
          Toast
      },
    data(){
        return{
            telphone:&#39;&#39;,//电话号码
            toastshow:false,//默认不现实提示信息
            toasttext:&#39;&#39;,//提示信息内容
            passw1:&#39;&#39;,//首次输入密码
            passw2:&#39;&#39;//再次输入密码
        }
    },
    methods:{
        //手机号验证失败时执行的方法
        telonInvalid(){
            //设置提示信息内容
            this.$set(&#39;toasttext&#39;,&#39;手机不正确&#39;);
            //显示提示信息组件
            this.$set(&#39;toastshow&#39;,true);
        },
        //密码验证失败时执行的方法
        passwInvalid(){
          this.$set(&#39;toasttext&#39;,&#39;只能输入6-20个字母、数字、下划线&#39;);
          this.$set(&#39;toastshow&#39;,true);
        },    
        register_user(){
            var that = this;
            var telephones = that.$get(&#39;telphone&#39;);
            var pw1 = that.$get(&#39;passw1&#39;);
            var pw2 = that.$get(&#39;passw2&#39;)  
            that.$validate(true, function () {            
                if (that.$validation_register1.invalid) {
                    //验证无效
                      that.$set(&#39;toasttext&#39;,&#39;请完善表单&#39;);
                     that.$set(&#39;toastshow&#39;,true);
                }else{
       that.$set(&#39;toasttext&#39;,&#39;验证通过&#39;);
       that.$set(&#39;toastshow&#39;,true);
       //验证通过做注册请求
       /*that.$http.post(&#39;http://192.168.30.235:9999/rest/user/register&#39;,
       &#39;account&#39;:telephones,&#39;pwd&#39;:pw1,&#39;pwd2&#39;:pw2}).then(function(data){
       if(data.data.code == &#39;0&#39;){
         that.$set(&#39;toasttext&#39;,&#39;注册成功&#39;);
           that.$set(&#39;toastshow&#39;,true);
           }else{
              that.$set(&#39;toasttext&#39;,&#39;注册失败&#39;);
             that.$set(&#39;toastshow&#39;,true);
                      }
             },function(error){
               //显示返回的错误信息
              that.$set(&#39;toasttext&#39;,String(error.status));
                 that.$set(&#39;toastshow&#39;,true);
                    })*/
                }
            })
            
        }
    }
}
</script>
<style>
.register-box{
    padding: 10px;
}
.pd05{
    margin-top: 5px;
}
.greenBtn{
    width: 173px;
    height: 30px;
    text-align: center;
    line-height: 30px;
    background: red;
    color: #fff;
    margin-top: 5px;
}
</style>

If you click next step, you will be prompted "Please complete the form" because the verification fails; if the text box loses focus after gaining focus, a corresponding error message will be prompted; if the content is filled in correctly, it will prompt that the verification has passed and send a corresponding request.

The effect is as shown

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