index.html

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>todo-list</title>
  </head>
  <body>
    <style>
    .fade-enter-active, .fade-leave-active {
      transition: opacity .5s
    }
    .fade-enter, .fade-leave-to /* .fade-leave-active in <2.1.8 */ {
      opacity: 0
    }
    </style>
    <div id="app"></div>
    <!-- built files will be auto injected -->
  </body>
</html>