<form v-form name="myform" @submit.prevent="onSubmit" role="form">
         <legend class="text-center">Vue-form demo</legend>
          <div class="form-group">
             <label>邮箱*</label>
              <input class="form-control" v-model="model.name" v-form-ctrl required name="name" />
            
          </div>
          <div class="form-group">
            <label>用户名*</label>
              <input class="form-control" v-model="model.email" v-form-ctrl name="email" type="email" required />
            
          </div>
          <div class="errors" v-if="myform.$submitted">
            <p class="bg-danger text-center" v-if="myform.name.$error.required">请输入用户名.</p>
            <p class="bg-danger text-center" v-if="myform.email.$error.email">请输入正确的邮箱.</p>
          </div>
          <button class="btn btn-success btn-block" type="submit">提交</button>
</form>

new Vue({
  el: '#app',
  data: {
    myform: {},
    model: {}
  },
  methods: {
    onSubmit: function() {
      console.log(this.myform.$valid);
      if(this.myform.$valid==true)
        alert("提交成功");
    }
  }
});