Name: Web Animations API: Reverse
Description: Learn how to create a smooth loading spinner with reverse playback functionality using waapi.

Learn how to create a smooth loading spinner with reverse playback functionality using waapi.

Learn how to create a smooth loading spinner with reverse playback functionality using waapi. Build an engaging interface element with a rotating border animation that responds to user interaction.

<html>
<head>
  <style>
    body {
      background-color: #222;
    }
    .container {
      display: flex;
      justify-content: center;
    }
    .circle {
      width: 200px;
      height: 200px;
      border-radius: 100%;
      border: 4px solid #fff;
      border-top: 4px solid blue;
    }
    button {
      font-size: 48px;
      margin-bottom: 25px;
    }
  </style>
</head>
<body>
  <button class="pause">Pause</button>
  <button class="play">Play</button>
  <button class="reverse">Reverse</button>
  <div class="container">
    <div class="circle"></div>
  </div>

  <script>
    const myAnimation = document.querySelector(".circle").animate(
      [
        {
          transform: "rotate(0)"
        },
        {
          transform: "rotate(359deg)"
        }
      ],
      {
        duration: 1000,
        iterations: Infinity
      }
    );

    document.querySelector(".pause")
      .addEventListener("click", () => myAnimation.pause());
    document.querySelector(".play")
      .addEventListener("click", () => myAnimation.play());
    document.querySelector(".reverse")
      .addEventListener("click", () => myAnimation.reverse());
  </script>
</body>
</html>