main repo

node_modules/motion-dom/dist/es/scroll/observe.mjs

@@ -0,0 +1,18 @@
+import { frame, cancelFrame } from '../frameloop/frame.mjs';
+
+function observeTimeline(update, timeline) {
+    let prevProgress;
+    const onFrame = () => {
+        const { currentTime } = timeline;
+        const percentage = currentTime === null ? 0 : currentTime.value;
+        const progress = percentage / 100;
+        if (prevProgress !== progress) {
+            update(progress);
+        }
+        prevProgress = progress;
+    };
+    frame.preUpdate(onFrame, true);
+    return () => cancelFrame(onFrame);
+}
+
+export { observeTimeline };