@keyup.enter=“submit” 和 @click=“submit” 不能绑在同一个地方，否则回车不起作用

错误：

<div class="layui-form-item" style="text-align: center">
  <button style="width:100%" class="layui-btn"  @click="submit"  @keyup.enter="submit" >登录</button>
</div>

正确：

<div class="layui-form-item">
  <input type="text" class="layui-input" v-model="rex" style="display:inline-block; width: 255px;"
      placeholder="请输入验证码（不区分大小写）" autocomplete="off" required lay-verify="required" @keyup.enter="submit" >
  <canvas id="canvas" width="110" height="43"
      style="display:inline-block;border:1px solid #eee;height:36px; float: right;" @click="refresh"></canvas> 
</div>
<div class="layui-form-item" style="text-align: center">
  <button style="width:100%" class="layui-btn" @click="submit" >登录</button>
</div>