HTML Code

<!DOCTYPE html>

<html lang="en">

<head>

  <meta charset="utf-8">

  <title>re-enable fx.off</title>

  <style>

    body { font-family: sans-serif; padding: 16px; max-width: 32rem; }

    button { padding: 8px 14px; margin: 0 8px 12px 0; }

    #track { position: relative; height: 60px; border: 1px dashed #cbd5e1; border-radius: 8px; margin-top: 12px; }

    #restore-box { width: 48px; height: 48px; background: #8b5cf6; border-radius: 8px; position: absolute; top: 6px; left: 0; opacity: 0.3; }

    #restore-status { font-weight: 600; margin-top: 8px; }

  </style>

</head>

<body>

  <button type="button" id="disable-all">Disable animations</button>

  <button type="button" id="enable-all">Re-enable and animate</button>

  <p id="restore-status">Animations ON (default)</p>

  <div id="track"><div id="restore-box"></div></div>

  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>

  <script>

    jQuery.fx.off = false;

    $("#disable-all").on("click", function () {

      jQuery.fx.off = true;

      $("#restore-status").text("Animations OFF (fx.off = true)");

    });

    $("#enable-all").on("click", function () {

      jQuery.fx.off = false;

      $("#restore-status").text("Animations ON — watch the box slide");

      $("#restore-box")

        .stop(true, true)

        .css({ left: 0, opacity: 0.3 })

        .animate({ left: 260, opacity: 1 }, 1200);

    });

  </script>

</body>

</html>

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jQuery.fx.off — re-enable animations (Try It)