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<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet" type="text/css" />
  <title>JS Bin</title>
</head>
<body>
  <div id="app" class="container">
    <form class="form-horizontal" @submit.prevent="validateBeforeSubmit">
      <div class="form-group">
        <label class="control-label col-md-2 col-sm-4" for="firstName">First Name:</label>
        <div class="col-md-5 col-sm-8" v-bind:class="{ 'has-error' : errors.has('FirstName') }">
          <input name="FirstName" v-model="firstName"  data-vv-delay="100" v-validate="'required|alpha|min:3'" class="form-control" type="text" id="firstName" placeholder="" v-bind:class="{ 'input': true, 'has-error': errors.has('FirstName') }" >
          <span v-show="errors.has('FirstName')" class="help-block error text-danger">{{ errors.first('FirstName') }}</span>
        </div>
      </div>
      
      <div class="form-group">
        <label class="control-label col-md-2 col-sm-4" for="lastName">Last Name:</label>
        <div class="col-md-5 col-sm-8" v-bind:class="{ 'has-error' : errors.has('LastName') }">
          <input name="LastName" v-model="lastName" v-validate="'required|alpha|min:3'" class="form-control" type="text" placeholder="" v-bind:class="{ 'input': true, 'has-error': errors.has('lastName') }" >
          <span v-show="errors.has('LastName')" class="help-block error text-danger">{{ errors.first('LastName') }}</span>
        </div>
      </div>
    </form>
    
    <a class="btn btn-success btn-md " v-on:click="validateBeforeSubmit">Validate Form</a>
    <hr />
    <pre>{{ errors }}</pre>
    <pre>{{ fields }}</pre>
  </div>
  
  
  
  <script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.0.3/vue.js"></script>
  <script src="https://cdn.jsdelivr.net/vee-validate/2.0.0-beta.21/vee-validate.min.js"></script>  
  <script src="https://code.jquery.com/jquery.min.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
​
</body>
</html>
 
Vue.use(VeeValidate);
​
var app = new Vue({
  el: '#app',
  
  data: {
    firstName: null,
    lastName: null
  },
  
  methods:{
    validateBeforeSubmit: function(){
      function onOk(){
        alert('Form is OK');
      }
      
      function notOk(){
        alert('Form Not OK');
      }
      
      this.$validator.validateAll().then(onOk, notOk);
    }
  }
});
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