spark-phone-field.blade.php

<!-- Phone -->
<div class="form-group" :class="{'has-error': form.errors.has('phone')}">
    <label class="col-md-4 control-label">Phone</label>

    <div class="col-md-6">
        <input type="phone" class="form-control" name="phone" v-model="form.phone">

        <span class="help-block" v-show="form.errors.has('phone')">
            @{{ form.errors.get('phone') }}
        </span>
    </div>
</div>