HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>hasPointerCapture release</title>
  <style>
    #slider {
      width: 280px;
      height: 48px;
      background: #eee;
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      touch-action: none;
      user-select: none;
    }
  </style>
</head>
<body>
  <div id="slider">Pointer down</div>
  <pre id="out">—</pre>
  <script>
    var slider = document.getElementById("slider");
    var out = document.getElementById("out");
    slider.addEventListener("pointerdown", function (ev) {
      slider.setPointerCapture(ev.pointerId);
      slider.releasePointerCapture(ev.pointerId);
      out.textContent = String(slider.hasPointerCapture(ev.pointerId));
    });
  </script>
</body>
</html>

Lines: 0 | Characters: 0

Live Preview Auto-refresh on Run

Element.hasPointerCapture — after release (Try It)