Element: hasPointerCapture() method

hasPointerCapture(pointerId)

<div id="target">Touch this element with a pointer.</div>

const el = document.getElementById("target");
el.addEventListener("pointerdown", (ev) => {
  // Element 'target' will receive/capture further events
  el.setPointerCapture(ev.pointerId);

  // …

  // Check whether element still has pointer capture
  const pointerCap = el.hasPointerCapture(ev.pointerId);
  if (pointerCap) {
    // We've still got pointer capture
  } else {
    // oops, we've lost pointer capture!
  }
});