JavaScript Document createTouch() Method

const supported = typeof document.createTouch === "function";
console.log(supported);

if (!supported) {
  console.log("Prefer TouchEvent() / real touch or pointer events (MDN).");
}

const target = document.getElementById("target");

if (typeof document.createTouch !== "function") {
  console.log("unsupported");
} else {
  const touch1 = document.createTouch(window, target, 1, 15, 20, 35, 40);
  const touch2 = document.createTouch(window, target, 2, 25, 30, 45, 50);
  console.log(touch1.identifier, touch1.pageX, touch1.pageY);
  console.log(touch2.identifier, touch2.pageX, touch2.pageY);
}

// Literacy: do not call createTouch in new apps.
console.log("createTouch deprecated — use TouchEvent() (MDN)");

// Real device input (preferred for products):
window.addEventListener("pointerdown", (e) => {
  console.log(e.pointerType, e.clientX, e.clientY);
});