如何让我的插入符号在点击下拉菜单时停止移动？

<div class="dropdown">
  <button class="dropbtn">下拉菜单</button>
  <div class="dropdown-content">
    <a href="#">选项1</a>
    <a href="#">选项2</a>
    <a href="#">选项3</a>
  </div>
</div>

.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-content {
  display: none;
  position: absolute;
  background-color: #f9f9f9;
  min-width: 160px;
  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
  z-index: 1;
}

.dropdown-content a {
  color: black;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
}

.dropdown:hover .dropdown-content {
  display: block;
}

var insertCursor = document.getElementById("insert-cursor");
var dropdown = document.getElementsByClassName("dropdown")[0];

dropdown.addEventListener("click", function() {
  insertCursor.style.animationPlayState = "paused";
});

dropdown.addEventListener("mouseleave", function() {
  insertCursor.style.animationPlayState = "running";
});