39 lines
1.3 KiB
JavaScript
39 lines
1.3 KiB
JavaScript
import { appearAnimationStore } from './store.mjs';
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import { appearStoreId } from './store-id.mjs';
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function handoffOptimizedAppearAnimation(elementId, valueName, frame) {
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const storeId = appearStoreId(elementId, valueName);
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const optimisedAnimation = appearAnimationStore.get(storeId);
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if (!optimisedAnimation) {
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return null;
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}
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const { animation, startTime } = optimisedAnimation;
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function cancelAnimation() {
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window.MotionCancelOptimisedAnimation?.(elementId, valueName, frame);
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}
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/**
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* We can cancel the animation once it's finished now that we've synced
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* with Motion.
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*
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* Prefer onfinish over finished as onfinish is backwards compatible with
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* older browsers.
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*/
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animation.onfinish = cancelAnimation;
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if (startTime === null || window.MotionHandoffIsComplete?.(elementId)) {
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/**
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* If the startTime is null, this animation is the Paint Ready detection animation
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* and we can cancel it immediately without handoff.
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*
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* Or if we've already handed off the animation then we're now interrupting it.
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* In which case we need to cancel it.
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*/
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cancelAnimation();
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return null;
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}
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else {
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return startTime;
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}
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}
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export { handoffOptimizedAppearAnimation };
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