在Bootstrap中单击时，卡显示为灰色

<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.min.js"></script>

<button class="btn btn-primary" id="myButton">点击我</button>

<script>
  document.getElementById("myButton").addEventListener("click", function() {
    this.classList.add("btn-clicked");
  });
</script>

.btn-clicked {
  background-color: gray;
}