05-layout/index.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Layout</title>
    <link rel="stylesheet" href="style.scss" />
  </head>
  <body>
    <div id="app" data-state="collapsed">
      <figure class="ui-figure" data-flip-bg>
        <figcaption class="ui-caption">Animation</figcaption>
      </figure>
      <div class="ui-content">
        <p>
          Lorem ipsum dolor sit amet consectetur adipisicing elit. Inventore
          ullam hic consectetur ducimus neque ipsam incidunt voluptatem
          voluptatum eos. Voluptatum minus omnis provident sit architecto,
          mollitia nihil aspernatur sed praesentium.
        </p>
      </div>
    </div>
  </body>
  <script>
    const figureEl = document.querySelector('.ui-figure');
    const captionEl = document.querySelector('.ui-caption');
    const appEl = document.querySelector('#app');

    appEl.addEventListener('click', () => {
      app.dataset.state =
        app.dataset.state === 'collapsed' ? 'expanded' : 'collapsed';
    });
    // ...
  </script>
</html>