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這期內容當中小編將會給大家帶來有關Vue中如何使用Validator表單驗證插件，文章內容豐富且以專業的角度為大家分析和敘述，閱讀完這篇文章希望大家可以有所收獲。
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="$validation.username.required">請輸入你的名字</p>
<p v-if="$validation.comment.maxlength">您的評論太長了</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>將要驗證的表單包裹在validator自定義元素指令中，而在要驗證的表單控件元素的 v-validate 屬性上綁定相應的校驗規則。
驗證結果會保存在組建實例的 $validation 屬性下。 $validation 是由 validator 元素和 name 屬性和 $ 前綴組件
驗證結果結構
{
// 表單整體驗證
"valid": false, // 字段校驗是否通過
"invalid": true, // valid 取反
"touched": false, // 校驗字段所在元素獲得通過焦點時返回true，否則返回false
"untouched": true, // touched 取反
"modified": false, // 當元素值與初始值不同時返回true，否則返回false
"dirty": false, // 字段值改變過至少一次返回true，否則返回false
"pristine": true, // dirty 取反
// 字段單一驗證
"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
}
}校驗結果由兩部分組成。表單整體校驗結果和單個字段校驗結果。
驗證器語法
v-validate 指令語法：
v-validate[:field]=”array literal | object literfal | binding”
校驗字段名field
field用來標識校驗字段，之后可以用該字段來引用校驗結果
v-validate 指令用來定義校驗規則，其值可以是數組字面量，對象字面量，組件實例數組屬性名。
數組字面量
當校驗器不需要額外參數時，可以使用數組字面量形式，如 required 校驗器，只要出現就帶I表該校驗器所在元素是必填項。
<div id="app"> <validator name="validation"> <form novalidate> Zip: <input type="text" v-validate:zip="['required']" /><br /> <div> <span v-if="$validation.zip.required">郵政編碼是必填項</span> </div> </form> </validator> </div>
對象字面量
對象字面量語法適合需要額外參數的校驗器。如限制輸入長度的校驗器 minlength,需要說明限制長度多少。
<div id="app">
<validator name="validation">
<form novalidate>
ID: <input type="text" v-validate:id="{ required:true, minlength: 3, maxlength: 16 }" />
<br />
<div>
<p v-if="$validation.id.required">ID不能為空</p>
<p v-if="$validation.id.minlength">你的ID名字太短</p>
<p v-if="$validation.id.maxlength">你的ID名字太長</p>
</div>
<input type="submit" value="send" v-if="$validation.valid" />
</form>
</validator>
</div>還可以用 對象字面量語法通過 rule 字段來自定義驗證規則
<div id="app">
<validator name="validation">
<form novalidate>
ID: <input type="text" v-validate:id="{minlength: {rule: 3}, required: true, maxlength: {rule: 16}}" />
<br />
<div>
<p v-if="$validation.id.required">ID不能為空</p>
<p v-if="$validation.id.minlength">你的ID名字太短</p>
<p v-if="$validation.id.maxlength">你的ID名字太長</p>
</div>
<input type="submit" value="send" v-if="$validation.valid" />
</form>
</validator>
</div>實例數據屬性
v-validate 的值可以是組建實例的數據屬性。這樣可以用來動態綁定校驗規則。
<div id="app">
<validator name="validation">
<form novalidate>
ID: <input type="text" v-validate:id="rules" /><br />
<div>
<p v-if="$validation.id.required">不能為空</p>
<p v-if="$validation.id.minlength">你的ID太短</p>
<p v-if="$validation.id.maxlength">你的ID太長</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>內置校驗規則
vue-validator 內置一些常用的驗證規則：
required — 輸入值不能為空
pattern — 必須匹配pattern表示的正則表達式
minlength — 輸入值長度不能小于minlength表示的值
maxlength — 輸入的值不能大于maxlength表示的值
min — 輸入值不能小于min表示的值
max — 輸入值不能大于max表示的值
與v-model同時使用
vue-validator會自動校驗通過v-model動態設置的值。
<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="$validation.message.required">message不能為空</p>
<p v-if="$validation.message.minlength">message輸入太長位數</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>重置校驗結果
通過在Vue組件實例上調用$resetValidation();方法來動態重置校驗結果。
<div id="app">
<validator name="validation">
<form novalidate>
<div class="username-field">
<label for="username">username:</label>
<input type="text" id="username" v-validate:username="['required']" />
</div>
<div class="comment-filed">
<label for="comment">comment:</label>
<input type="text" id="comment" v-validate:comment="{maxlength: 256}" />
</div>
<div class="errors">
<p v-if="$validation.username.required">用戶名不能為空</p>
<p v-if="$validation.comment.maxlength">輸入文字超過256個</p>
<input type="submit" value="send" v-if="$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>復選框checkbox
<div id="app">
<validator name="validation">
<form novalidate>
<h2>調查</h2>
<fieldset>
<legend>請選擇水果</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 $validation.fruits">
<p>{{msg | json}}</p>
</li>
</ul>
</fieldset>
</form>
</validator>
</div>
<script src="//cdn.bootcss.com/vue/1.0.24/vue.js" type="text/javascript" charset="utf-8"></script>
<script src="//cdn.bootcss.com/vue-validator/2.1.3/vue-validator.js" type="text/javascript" charset="utf-8"></script>
<script type="text/javascript">
new Vue({
el: '#app',
computed: {
requiredErrorMsg: function () {
return '請選擇水果';
},
minlengthErrorMsg: function () {
return '請選擇至少1個水果!';
},
maxlengthErrorMsg: function () {
return '請選擇最多2個水果!';
}
}
});
</script>下拉類表select
<div id="app">
<validator name="validation">
<form novalidate>
<select v-validate:lang="{required: true}">
<option value="">請選擇語言</option>
<option value="javascript">javascript</option>
<option value="php">php</option>
<option value="node">node</option>
</select>
<div class="errors">
<p v-if="$validation.lang.required">不能為空！</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>校驗狀態class
各校驗狀態都有其對應的class(默認) 也可以自定義校驗狀態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屬性只能在validator元素或應用了v-validate的元素上使用有效 -->分組校驗
vue-validator支持分組校驗。例如重復密碼功能。
<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="$validation.username.required">用戶名不能為空</p>
<p v-if="$validation.password.required">密碼不能為空</p>
<p v-if="$validation.password.minlength">密碼不能少于8位</p>
<p v-if="$validation.password-comfirm.required">重復密碼不能為空</p>
<p v-if="$validation.password-comfirm.minlength">密碼不能少于8位</p>
<p v-if="$validation.passwordGroup.valid">密碼不一致</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>上述就是小編為大家分享的Vue中如何使用Validator表單驗證插件了，如果剛好有類似的疑惑，不妨參照上述分析進行理解。如果想知道更多相關知識，歡迎關注億速云行業資訊頻道。
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