Javascript 在不使用jQuery的情况下捕获BootstrapNative模式关闭事件

我正在使用，我想检测一个模式何时关闭，有没有一种方法可以用纯javascript实现这一点

<!-- Modal -->
<div class="modal fade" id="exampleModal" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel" aria-hidden="true">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <h5 class="modal-title" id="exampleModalLabel">Modal title</h5>
        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
          <span aria-hidden="true">&times;</span>
        </button>
      </div>
      <div class="modal-body">
        ...
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
        <button type="button" class="btn btn-primary">Save changes</button>
      </div>
    </div>
  </div>
</div>

但事件不会触发。

请查看此文档：它将以某种方式帮助您

document.getElementById("exampleModal").addEventListener("transitionend", console.log("closed"));