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node_modules/framer-motion/dist/es/render/dom/scroll/on-scroll-handler.mjs

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+import { warnOnce } from 'motion-utils';
+import { updateScrollInfo } from './info.mjs';
+import { resolveOffsets } from './offsets/index.mjs';
+
+function measure(container, target = container, info) {
+    /**
+     * Find inset of target within scrollable container
+     */
+    info.x.targetOffset = 0;
+    info.y.targetOffset = 0;
+    if (target !== container) {
+        let node = target;
+        while (node && node !== container) {
+            info.x.targetOffset += node.offsetLeft;
+            info.y.targetOffset += node.offsetTop;
+            node = node.offsetParent;
+        }
+    }
+    info.x.targetLength =
+        target === container ? target.scrollWidth : target.clientWidth;
+    info.y.targetLength =
+        target === container ? target.scrollHeight : target.clientHeight;
+    info.x.containerLength = container.clientWidth;
+    info.y.containerLength = container.clientHeight;
+    /**
+     * In development mode ensure scroll containers aren't position: static as this makes
+     * it difficult to measure their relative positions.
+     */
+    if (process.env.NODE_ENV !== "production") {
+        if (container && target && target !== container) {
+            warnOnce(getComputedStyle(container).position !== "static", "Please ensure that the container has a non-static position, like 'relative', 'fixed', or 'absolute' to ensure scroll offset is calculated correctly.");
+        }
+    }
+}
+function createOnScrollHandler(element, onScroll, info, options = {}) {
+    return {
+        measure: (time) => {
+            measure(element, options.target, info);
+            updateScrollInfo(element, info, time);
+            if (options.offset || options.target) {
+                resolveOffsets(element, info, options);
+            }
+        },
+        notify: () => onScroll(info),
+    };
+}
+
+export { createOnScrollHandler };