vue/css-transitions/index.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>CSS Transitions</title>
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/modern-normalize/0.5.0/modern-normalize.min.css">
</head>
<body>
  <style>
    .fade-enter-active {
      transition: all 0.5s 1s ease;
    }
    .fade-leave-active {
      transition: all 1s 1s ease;
    }
    .fade-enter, .fade-leave-to {
      transform: translateY(20px);
      opacity: 0;
    }
    #root > div {
      background: bisque;
      padding: 10px;
      width: 300px;
    }
  </style>
  <div id="root">
    <button @click="divVisible = !divVisible">Toggle visibility</button>

    <transition name="fade">
      <div v-if="divVisible">CLick the button to toggle my visibility</div>
    </transition>
  </div>
  <script src="https://cdn.jsdelivr.net/npm/vue@2.6.10/dist/vue.js"></script>
  <script>
  new Vue({
    el: '#root',
    data: {
      divVisible: true
    }
  })
  </script>
</body>
</html>