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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>createTouch MDN</title>
  <style>body{font-family:system-ui,sans-serif;padding:1.5rem;} #target{border:1px dashed #999;padding:1rem;} pre{border:1px solid #ccc;padding:0.75rem;}</style>
</head>
<body>
  <div id="target">target</div>
  <button id="btn" type="button">Try MDN createTouch</button>
  <pre id="out">Click the button</pre>
  <script>
    document.getElementById("btn").addEventListener("click", function () {
      var target = document.getElementById("target");
      if (typeof document.createTouch === "function") {
        var touch1 = document.createTouch(window, target, 1, 15, 20, 35, 40);
        var touch2 = document.createTouch(window, target, 2, 25, 30, 45, 50);
        document.getElementById("out").textContent =
          "identifiers: " + touch1.identifier + " " + touch2.identifier;
      } else {
        document.getElementById("out").textContent = "createTouch not available";
      }
    });
  </script>
</body>
</html>

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Document.createTouch — MDN two touches (Try It)