这期内容当中小编将会给大家带来有关Vue中如何使用Validator表单验证插件，文章内容丰富且以专业的角度为大家分析和叙述，阅读完这篇文章希望大家可以有所收获。
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>
<h2>调查</h2>
<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>上述就是小编为大家分享的Vue中如何使用Validator表单验证插件了，如果刚好有类似的疑惑，不妨参照上述分析进行理解。如果想知道更多相关知识，欢迎关注编程网行业资讯频道。
