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我正在尝试使用示例 tailwindui.com 组件。他们在评论中定义了动画部分，但我无法弄清楚我应该如何在我的代码中使用这些动画部分。我正在使用普通的 html/js，并且不希望为此使用任何框架/lib。

在这里，我试图显示/隐藏一个模态对话框。背景覆盖的动画 doe 给出为

 <!--
      Background overlay, show/hide based on modal state.

      Entering: "ease-out duration-300"
        From: "opacity-0"
        To: "opacity-100"
      Leaving: "ease-in duration-200"
        From: "opacity-100"
        To: "opacity-0"
    -->

我不知道如何将此信息编码到背景覆盖 div。

<div id="myModal" class="hidden fixed z-10 inset-0 overflow-y-auto" aria-labelledby="modal-title" role="dialog" aria-modal="true">
  <div class="flex items-end justify-center min-h-screen pt-4 px-4 pb-20 text-center sm:block sm:p-0">
    <!--
      Background overlay, show/hide based on modal state.

      Entering: "ease-out duration-300"
        From: "opacity-0"
        To: "opacity-100"
      Leaving: "ease-in duration-200"
        From: "opacity-100"
        To: "opacity-0"
    -->
    <div class="fixed inset-0 bg-gray-500 bg-opacity-75 transition-opacity" aria-hidden="true"></div>

到目前为止，这是我尝试过的；

<style>
  .modalEntry {animation:modal-in 1s;}  
  .modalExit {animation:modal-in 1s;}

@keyframes modal-in {
    from {opacity-0;}
    to {opacity-100;}
}
@keyframes modal-out {
    from {opacity-100;}
    to {opacity-0;}
}
</style>

<button class="border border-red-500" onclick="toggleModal()">Toggle modal</button>

<!-- This example requires Tailwind CSS v2.0+ -->
<div id="myModal" class="hidden fixed z-10 inset-0 overflow-y-auto" aria-labelledby="modal-title" role="dialog" aria-modal="true">
  <div class="flex items-end justify-center min-h-screen pt-4 px-4 pb-20 text-center sm:block sm:p-0">
    <!--
      Background overlay, show/hide based on modal state.

      Entering: "ease-out duration-300"
        From: "opacity-0"
        To: "opacity-100"
      Leaving: "ease-in duration-200"
        From: "opacity-100"
        To: "opacity-0"
    -->
    <div class="fixed modalEntry inset-0 bg-gray-500 bg-opacity-75 transition-opacity" aria-hidden="true"></div>

    <!-- This element is to trick the browser into centering the modal contents. -->
    <span class="hidden sm:inline-block sm:align-middle sm:h-screen" aria-hidden="true">&#8203;</span>

    <!--
      Modal panel, show/hide based on modal state.

      Entering: "ease-out duration-300"
        From: "opacity-0 translate-y-4 sm:translate-y-0 sm:scale-95"
        To: "opacity-100 translate-y-0 sm:scale-100"
      Leaving: "ease-in duration-200"
        From: "opacity-100 translate-y-0 sm:scale-100"
        To: "opacity-0 translate-y-4 sm:translate-y-0 sm:scale-95"
    -->
    <div class="inline-block align-bottom bg-white rounded-lg text-left overflow-hidden shadow-xl transform transition-all sm:my-8 sm:align-middle sm:max-w-lg sm:w-full">
      <div class="bg-white px-4 pt-5 pb-4 sm:p-6 sm:pb-4">
        <div class="sm:flex sm:items-start">
          <div class="mx-auto flex-shrink-0 flex items-center justify-center h-12 w-12 rounded-full bg-red-100 sm:mx-0 sm:h-10 sm:w-10">
            <!-- Heroicon name: outline/exclamation -->
            <svg class="h-6 w-6 text-red-600" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="currentColor" aria-hidden="true">
              <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 9v2m0 4h.01m-6.938 4h13.856c1.54 0 2.502-1.667 1.732-3L13.732 4c-.77-1.333-2.694-1.333-3.464 0L3.34 16c-.77 1.333.192 3 1.732 3z" />
            </svg>
          </div>
          <div class="mt-3 text-center sm:mt-0 sm:ml-4 sm:text-left">
            <h3 class="text-lg leading-6 font-medium text-gray-900" id="modal-title">Deactivate account</h3>
            <div class="mt-2">
              <p class="text-sm text-gray-500">Are you sure you want to deactivate your account? All of your data will be permanently removed. This action cannot be undone.</p>
            </div>
          </div>
        </div>
      </div>
      <div class="bg-gray-50 px-4 py-3 sm:px-6 sm:flex sm:flex-row-reverse">
        <button onclick="toggleModal()" type="button" class="w-full inline-flex justify-center rounded-md border border-transparent shadow-sm px-4 py-2 bg-red-600 text-base font-medium text-white hover:bg-red-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-red-500 sm:ml-3 sm:w-auto sm:text-sm">Deactivate</button>
        <button onclick="toggleModal()" type="button" class="mt-3 w-full inline-flex justify-center rounded-md border border-gray-300 shadow-sm px-4 py-2 bg-white text-base font-medium text-gray-700 hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-indigo-500 sm:mt-0 sm:ml-3 sm:w-auto sm:text-sm">Cancel</button>
      </div>
    </div>
  </div>
</div>

<script>
  function toggleModal () {
        document.getElementById("myModal").classList.toggle("hidden");
  }
</script>

为了便于测试，我已将其放入代码笔中。 https://codepen.io/rishavs/pen/BadMQaN?editors=1000

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