Vue表单验证插件Vue Validator使用方法详解

2019-11-19 16:53:30

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Vue-validator 是Vue的表单验证插件，供大家参考，具体内容如下

Vue版本： 1.0.24
Vue-validator版本： 2.1.3

基本使用

<div id="app"> <validator name="validation">  <form novalidate>   <div class="username-field">    <label for="username">username:</label>    <input type="text" id="username" v-validate:username="['required']" />   </div>   <div class="comment-filed">    <label for="comment">comment:</label>    <input type="text" id="comment" v-validate:comment="{maxlength: 256}" />   </div>   <div class="errors">    <p v-if="$validation.username.required">请输入你的名字</p>    <p v-if="$validation.comment.maxlength">您的评论太长了</p>   </div>   <input type="submit" value="send" v-if="$validation.valid" />  </form> </validator></div><script src="//cdn.bootcss.com/vue/1.0.24/vue.js" type="text/javascript" charset="utf-8"></script><script src="//cdn.bootcss.com/vue-validator/2.1.3/vue-validator.js" type="text/javascript" charset="utf-8"></script><script type="text/javascript"> new Vue({  el: '#app' });</script>

将要验证的表单包裹在validator自定义元素指令中，而在要验证的表单控件元素的 v-validate 属性上绑定相应的校验规则。

验证结果会保存在组建实例的 $validation 属性下。 $validation 是由 validator 元素和 name 属性和 $ 前缀组件

验证结果结构

{ // 表单整体验证 "valid": false, // 字段校验是否通过  "invalid": true, // valid 取反 "touched": false, // 校验字段所在元素获得通过焦点时返回true，否则返回false "untouched": true, // touched 取反 "modified": false, // 当元素值与初始值不同时返回true，否则返回false "dirty": false, // 字段值改变过至少一次返回true，否则返回false  "pristine": true, // dirty 取反 // 字段单一验证 "username": {  "required": true,  "modified": false,  "pristine": true,  "dirty": false,  "untouched": true,   "touched": false,  "invalid": true,  "valid": false }, "comment": {  "maxlength": false,  "modified": false,  "pristine": true,  "dirty": false,  "untouched": true,  "touched": false,  "invalid": false,  "valid": true }}

校验结果由两部分组成。表单整体校验结果和单个字段校验结果。

验证器语法

v-validate 指令语法：

v-validate[:field]=”array literal | object literfal | binding”

校验字段名field

field用来标识校验字段，之后可以用该字段来引用校验结果

v-validate 指令用来定义校验规则，其值可以是数组字面量，对象字面量，组件实例数组属性名。

数组字面量

当校验器不需要额外参数时，可以使用数组字面量形式，如 required 校验器，只要出现就带I表该校验器所在元素是必填项。

<div id="app"> <validator name="validation">  <form novalidate>   Zip: <input type="text" v-validate:zip="['required']" /><br />   <div>    <span v-if="$validation.zip.required">邮政编码是必填项</span>   </div>  </form> </validator></div>

对象字面量

对象字面量语法适合需要额外参数的校验器。如限制输入长度的校验器 minlength,需要说明限制长度多少。

<div id="app"> <validator name="validation">  <form novalidate>   ID: <input type="text" v-validate:id="{ required:true, minlength: 3, maxlength: 16 }" />   <br />   <div>    <p v-if="$validation.id.required">ID不能为空</p>    <p v-if="$validation.id.minlength">你的ID名字太短</p>    <p v-if="$validation.id.maxlength">你的ID名字太长</p>   </div>   <input type="submit" value="send" v-if="$validation.valid" />  </form> </validator></div>

还可以用对象字面量语法通过 rule 字段来自定义验证规则

<div id="app"> <validator name="validation">  <form novalidate>   ID: <input type="text" v-validate:id="{minlength: {rule: 3}, required: true, maxlength: {rule: 16}}" />   <br />   <div>    <p v-if="$validation.id.required">ID不能为空</p>    <p v-if="$validation.id.minlength">你的ID名字太短</p>    <p v-if="$validation.id.maxlength">你的ID名字太长</p>   </div>   <input type="submit" value="send" v-if="$validation.valid" />  </form> </validator></div>

实例数据属性

v-validate 的值可以是组建实例的数据属性。这样可以用来动态绑定校验规则。

<div id="app"> <validator name="validation"> <form novalidate>  ID: <input type="text" v-validate:id="rules" /><br />  <div>   <p v-if="$validation.id.required">不能为空</p>   <p v-if="$validation.id.minlength">你的ID太短</p>   <p v-if="$validation.id.maxlength">你的ID太长</p>  </div> </form> </validator></div><script src="//cdn.bootcss.com/vue/1.0.24/vue.js" type="text/javascript" charset="utf-8"></script><script src="//cdn.bootcss.com/vue-validator/2.1.3/vue-validator.js" type="text/javascript" charset="utf-8"></script><script type="text/javascript"> new Vue({  el: '#app',  data: {   rules: {    required: true,    minlength: 3,    maxlength: 16   }  } }); </script>

内置校验规则

vue-validator 内置一些常用的验证规则：

required ― 输入值不能为空
pattern ― 必须匹配pattern表示的正则表达式
minlength ― 输入值长度不能小于minlength表示的值
maxlength ― 输入的值不能大于maxlength表示的值
min ― 输入值不能小于min表示的值
max ― 输入值不能大于max表示的值

与v-model同时使用

vue-validator会自动校验通过v-model动态设置的值。

<div id="app"> <validator name="validation">  <form novalidate>   message: <input type="text" v-model="msg" v-validate:message="{required: ture, minlength: 8}" />   <br />   <p v-if="$validation.message.required">message不能为空</p>   <p v-if="$validation.message.minlength">message输入太长位数</p>  </form> </validator></div><script src="//cdn.bootcss.com/vue/1.0.24/vue.js" type="text/javascript" charset="utf-8"></script><script src="//cdn.bootcss.com/vue-validator/2.1.3/vue-validator.js" type="text/javascript" charset="utf-8"></script><script type="text/javascript"> var vm = new Vue({  el: '#app',  data: {   msg: ''  } });  setTimeout(function () {  vm.msg = 'hello world!'; }, 2000); </script>

重置校验结果

通过在Vue组件实例上调用$resetValidation();方法来动态重置校验结果。

<div id="app"> <validator name="validation">  <form novalidate>   <div class="username-field">    <label for="username">username:</label>    <input type="text" id="username" v-validate:username="['required']" />   </div>   <div class="comment-filed">    <label for="comment">comment:</label>    <input type="text" id="comment" v-validate:comment="{maxlength: 256}" />   </div>   <div class="errors">    <p v-if="$validation.username.required">用户名不能为空</p>    <p v-if="$validation.comment.maxlength">输入文字超过256个</p>    <input type="submit" value="send" v-if="$validation.valid" />    <button type="button" @click="onReset">Reset Validation</button>   </div>   <pre>{{$validation | json}}</pre>  </form> </validator></div><script src="//cdn.bootcss.com/vue/1.0.24/vue.js" type="text/javascript" charset="utf-8"></script><script src="//cdn.bootcss.com/vue-validator/2.1.3/vue-validator.js" type="text/javascript" charset="utf-8"></script><script type="text/javascript">  new Vue({  el: '#app',  methods: {   onReset: function () {    this.$resetValidation();   }  } }); </script>

复选框checkbox

<div id="app"> <validator name="validation">  <form novalidate>   <h1>调查</h1>   <fieldset>        <legend>请选择水果</legend>    <input type="checkbox" id="apple" value="apple" v-validate:fruits="{     required: { rule: true, message: requiredErrorMsg },     minlength: { rule: 1, message: minlengthErrorMsg },     maxlength: { rule: 2, message: maxlengthErrorMsg }     }" />         <label for="apple">Apple</label>    <input type="checkbox" id="orange" value="orange" v-validate:fruits />    <label for="orange">Orange</label>    <input type="checkbox" id="grape" value="grape" v-validate:fruits />    <label for="grape">Grape</label>    <input type="checkbox" id="banana" value="banana" v-validate:fruits />    <label for="banana">Banana</label>        <ul class="errors">     <li v-for="msg in $validation.fruits">      <p>{{msg | json}}</p>     </li>    </ul>   </fieldset>  </form> </validator></div><script src="//cdn.bootcss.com/vue/1.0.24/vue.js" type="text/javascript" charset="utf-8"></script><script src="//cdn.bootcss.com/vue-validator/2.1.3/vue-validator.js" type="text/javascript" charset="utf-8"></script><script type="text/javascript">  new Vue({  el: '#app',  computed: {   requiredErrorMsg: function () {    return '请选择水果';   },   minlengthErrorMsg: function () {    return '请选择至少1个水果!';   },   maxlengthErrorMsg: function () {    return '请选择最多2个水果!';   }  } }); </script>

下拉类表select

<div id="app">  <validator name="validation">  <form novalidate>   <select v-validate:lang="{required: true}">    <option value="">请选择语言</option>    <option value="javascript">javascript</option>    <option value="php">php</option>    <option value="node">node</option>   </select>   <div class="errors">    <p v-if="$validation.lang.required">不能为空！</p>   </div>  </form> </validator> </div><script src="//cdn.bootcss.com/vue/1.0.24/vue.js" type="text/javascript" charset="utf-8"></script><script src="//cdn.bootcss.com/vue-validator/2.1.3/vue-validator.js" type="text/javascript" charset="utf-8"></script><script type="text/javascript">  new Vue({  el: '#app' }); </script>

校验状态class

各校验状态都有其对应的class(默认) 也可以自定义校验状态class

<validator name="validation" :classes="{touched: 'touehc-validator', dirty: 'dirty-validator'}"> <label for="username">username</label> <<input type="text" id="username" :classes="{valid: 'valid-username', invalid: 'invalid-username'}" v-validate:username="{required: {rule: true, message: 'required you name!'}}"></validator><!-- classes属性只能在validator元素或应用了v-validate的元素上使用有效 -->

分组校验

vue-validator支持分组校验。例如重复密码功能。

<div id="app"> <validator name="validation" :groups="['passwordGroup']">  <form novalidate>   username: <input type="text" v-validate:username="['required']" /><br />   password: <input type="password" v-validate:password="{ minlength: 8, required: true }" group="passwordGroup" /><br />   comfirm password: <input type="password" v-validate:password-comfirm="{minlength: 8, required: true}" group="passwordGroup" />   <div class="errors">    <p v-if="$validation.username.required">用户名不能为空</p>    <p v-if="$validation.password.required">密码不能为空</p>    <p v-if="$validation.password.minlength">密码不能少于8位</p>    <p v-if="$validation.password-comfirm.required">重复密码不能为空</p>    <p v-if="$validation.password-comfirm.minlength">密码不能少于8位</p>    <p v-if="$validation.passwordGroup.valid">密码不一致</p>   </div>  </form> </validator></div><script src="//cdn.bootcss.com/vue/1.0.24/vue.js" type="text/javascript" charset="utf-8"></script><script src="//cdn.bootcss.com/vue-validator/2.1.3/vue-validator.js" type="text/javascript" charset="utf-8"></script><script type="text/javascript">  new Vue({  el: '#app' }); </script>

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