Element: setCapture() method

setCapture(retargetToElement)

<p>This is an example of how to use mouse capture on elements in Gecko 2.0.</p>
<p><a id="myButton" href="#">Test Me</a></p>
<div id="output">No events yet</div>

#myButton {
  border: solid black 1px;
  color: black;
  padding: 2px;
  box-shadow: black 2px 2px;
}

function mouseDown(e) {
  e.target.setCapture();
  e.target.addEventListener("mousemove", mouseMoved);
}

function mouseUp(e) {
  e.target.removeEventListener("mousemove", mouseMoved);
}

function mouseMoved(e) {
  const output = document.getElementById("output");
  output.textContent = `Position: ${e.clientX}, ${e.clientY}`;
}

const btn = document.getElementById("myButton");
if (btn.setCapture) {
  btn.addEventListener("mousedown", mouseDown);
  btn.addEventListener("mouseup", mouseUp);
} else {
  document.getElementById("output").textContent =
    "Sorry, there appears to be no setCapture support on this browser";
}