A brief discussion on drop-down menu events in Bootstrap3

This article takes you through the events of the Bootstrap3 drop-down menu. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to everyone.

Events of the drop-down menu

Bootstrap provides 4 events for the drop-down menu plug-in. By listening to these events, you can control specific Respond to user actions during the operation phase. These events and their meanings are shown in Table 4‑3.

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If developers want to customize the functions of the drop-down menu, they can listen to these events through JavaScript to perform corresponding operations. Such as:

<script>
  $(&#39;#myDropdown&#39;).on(&#39;show.bs.dropdown&#39;, function () {
   alert("开始显示下拉菜单。");
  });
  $(&#39;#myDropdown&#39;).on(&#39;shown.bs.dropdown&#39;, function () {
     alert("下拉菜单已经显示。");
  });
  $(&#39;#myDropdown&#39;).on(&#39;hide.bs.dropdown&#39;, function () {
     alert("开始隐藏下拉菜单。");
  });
  $(&#39;#myDropdown&#39;).on(&#39;hidden.bs.dropdown&#39;, function () {
     alert("下拉菜单已经隐藏。");
  });
</script>

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