span-error.html

div class="form-group row">
    <label for="inputEmail3" class="col-sm-2 col-form-label">Email</label>
    <div class="col-sm-10">
        <input type="text" class="form-control" id="inputEmail3" placeholder="Email" v-model="form.email" required>
        <span class="invalid-feedback d-block" role="alert" v-if="form.errors.has('email')" v-text="form.errors.get('email')"></span>
    </div>
</div>