main repo

node_modules/framer-motion/dist/es/render/utils/motion-values.mjs

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+import { isMotionValue, motionValue } from 'motion-dom';
+
+function updateMotionValuesFromProps(element, next, prev) {
+    for (const key in next) {
+        const nextValue = next[key];
+        const prevValue = prev[key];
+        if (isMotionValue(nextValue)) {
+            /**
+             * If this is a motion value found in props or style, we want to add it
+             * to our visual element's motion value map.
+             */
+            element.addValue(key, nextValue);
+        }
+        else if (isMotionValue(prevValue)) {
+            /**
+             * If we're swapping from a motion value to a static value,
+             * create a new motion value from that
+             */
+            element.addValue(key, motionValue(nextValue, { owner: element }));
+        }
+        else if (prevValue !== nextValue) {
+            /**
+             * If this is a flat value that has changed, update the motion value
+             * or create one if it doesn't exist. We only want to do this if we're
+             * not handling the value with our animation state.
+             */
+            if (element.hasValue(key)) {
+                const existingValue = element.getValue(key);
+                if (existingValue.liveStyle === true) {
+                    existingValue.jump(nextValue);
+                }
+                else if (!existingValue.hasAnimated) {
+                    existingValue.set(nextValue);
+                }
+            }
+            else {
+                const latestValue = element.getStaticValue(key);
+                element.addValue(key, motionValue(latestValue !== undefined ? latestValue : nextValue, { owner: element }));
+            }
+        }
+    }
+    // Handle removed values
+    for (const key in prev) {
+        if (next[key] === undefined)
+            element.removeValue(key);
+    }
+    return next;
+}
+
+export { updateMotionValuesFromProps };