create bug.tools

js/counter.js

@@ -0,0 +1,21 @@
+(function () {
+  const COUNTER_DURATION = 2000;
+
+  fetch("https://counter.bug-dev-mail.workers.dev")
+    .then(r => r.text())
+    .then(count => {
+      const target = parseInt(count, 10);
+      const el = document.getElementById("counter");
+      const start = performance.now();
+
+      function tick(now) {
+        const t = Math.min((now - start) / COUNTER_DURATION, 1);
+        const eased = 1 - Math.pow(1 - t, 3);
+        const current = Math.round(eased * target);
+        el.textContent = String(current).padStart(7, '0');
+        if (t < 1) requestAnimationFrame(tick);
+      }
+
+      requestAnimationFrame(tick);
+    });
+})();