From f57e302df0aa401657489ae04caa4cae9142f003 Mon Sep 17 00:00:00 2001
From: Vitaly Turovsky <vital2580@icloud.com>
Date: Sun, 8 Oct 2023 21:56:15 +0300
Subject: [PATCH] add experiments folder

---
 experiments/pointers.html | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 experiments/pointers.html
diff --git a/experiments/pointers.html b/experiments/pointers.html
new file mode 100644
index 00000000..1d2d15dc
--- /dev/null
+++ b/experiments/pointers.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Document</title>
+</head>
+<body>
+    <div id="captured"></div>
+    <script>
+        const pointers = []
+        const up = () => {
+            captured.textContent = pointers.join(', ')
+        }
+        window.addEventListener('pointerdown', (e) => {
+            pointers.push(e.pointerId)
+            document.body.setPointerCapture(e.pointerId)
+            up()
+            e.preventDefault()
+        })
+        const remove = (id) => {
+            pointers.splice(pointers.indexOf(id), 1)
+            up()
+        }
+        window.addEventListener('pointerup', (e) => {
+            pointers.push('up')
+            remove(e.pointerId)
+        })
+        window.addEventListener('pointercancel', (e) => {
+            pointers.push('cancel')
+            remove(e.pointerId)
+        })
+        window.addEventListener('lostpointercapture', (e) => {
+            pointers.push('lost')
+            remove(e.pointerId)
+        })
+    </script>
+</body>
+</html>
