examples/requestAnimationFrame/requestAnimationFrame.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>Document</title>
    <style>
      html,
      body {
        margin: 0;
        padding: 0;
      }
      body {
        width: 100vw;
        height: 100vh;
      }
      #box {
        width: 100px;
        height: 100px;
        margin-top: 50px;
        background: #f00;
        position: absolute;
      }
    </style>
  </head>
  <body>
    <div id="box"></div>
    <script>
      window.onload = function () {
        main();
      };

      function main() {
        var box = document.getElementById('box');
        var left = 0;
        function animate() {
          left++;
          if (left + 100 >= window.innerWidth) {
            left = 0;
          }
          box.style.left = left + 'px';
          requestAnimationFrame(animate);
          // setTimeout(animate, 1000 / 60);
        }
        animate();
      }
    </script>
  </body>
</html>