main repo

node_modules/framer-motion/dist/es/render/dom/scroll/utils/get-timeline.mjs

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+import { supportsScrollTimeline } from 'motion-dom';
+import { scrollInfo } from '../track.mjs';
+
+const timelineCache = new Map();
+function scrollTimelineFallback(options) {
+    const currentTime = { value: 0 };
+    const cancel = scrollInfo((info) => {
+        currentTime.value = info[options.axis].progress * 100;
+    }, options);
+    return { currentTime, cancel };
+}
+function getTimeline({ source, container, ...options }) {
+    const { axis } = options;
+    if (source)
+        container = source;
+    const containerCache = timelineCache.get(container) ?? new Map();
+    timelineCache.set(container, containerCache);
+    const targetKey = options.target ?? "self";
+    const targetCache = containerCache.get(targetKey) ?? {};
+    const axisKey = axis + (options.offset ?? []).join(",");
+    if (!targetCache[axisKey]) {
+        targetCache[axisKey] =
+            !options.target && supportsScrollTimeline()
+                ? new ScrollTimeline({ source: container, axis })
+                : scrollTimelineFallback({ container, ...options });
+    }
+    return targetCache[axisKey];
+}
+
+export { getTimeline };