HTML Code

<!DOCTYPE html>

<html lang="en">

<head>

  <meta charset="utf-8">

  <title>stop go stop back</title>

  <style>

    body { font-family: sans-serif; padding: 16px; min-height: 120px; }

    .block { position: absolute; background: #abc; left: 0; top: 50px; width: 60px; height: 60px; border-radius: 6px; }

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

  </style>

</head>

<body>

  <button type="button" id="go">Go</button>

  <button type="button" id="stop">STOP!</button>

  <button type="button" id="back">Back</button>

  <div class="block"></div>

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

  <script>

    $("#go").on("click", function () {

      $(".block").animate({ left: "+=100px" }, 2000);

    });

    $("#stop").on("click", function () {

      $(".block").stop();

    });

    $("#back").on("click", function () {

      $(".block").animate({ left: "-=100px" }, 2000);

    });

  </script>

</body>

</html>

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jQuery .stop() — Go STOP Back (Try It)