HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>getAnimations pause</title>
  <style>
    body{font-family:system-ui,sans-serif;padding:1.5rem;}
    #box{width:48px;height:48px;background:#22c55e;border-radius:6px;}
    button{margin:0.75rem 0.5rem 0 0;}
    pre{border:1px solid #ccc;padding:0.75rem;}
  </style>
</head>
<body>
  <div id="box"></div>
  <button id="start" type="button">Start</button>
  <button id="pause" type="button">Pause all</button>
  <button id="play" type="button">Play all</button>
  <pre id="out">Ready</pre>
  <script>
    var box = document.getElementById("box");
    var out = document.getElementById("out");
    function report() {
      out.textContent = document.getAnimations().map(function (a) {
        return a.playState;
      }).join(", ") || "(none)";
    }
    document.getElementById("start").addEventListener("click", function () {
      box.getAnimations().forEach(function (a) { a.cancel(); });
      box.animate(
        [{ transform: "scale(1)" }, { transform: "scale(1.4)" }],
        { duration: 800, iterations: Infinity, direction: "alternate" }
      );
      report();
    });
    document.getElementById("pause").addEventListener("click", function () {
      document.getAnimations().forEach(function (animation) {
        animation.pause();
      });
      report();
    });
    document.getElementById("play").addEventListener("click", function () {
      document.getAnimations().forEach(function (animation) {
        animation.play();
      });
      report();
    });
  </script>
</body>
</html>

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Document.getAnimations — pause all (Try It)