animation-controls.mjs
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import { animateVisualElement, setTarget } from 'motion-dom';
import { invariant } from 'motion-utils';
function stopAnimation(visualElement) {
visualElement.values.forEach((value) => value.stop());
}
function setVariants(visualElement, variantLabels) {
const reversedLabels = [...variantLabels].reverse();
reversedLabels.forEach((key) => {
const variant = visualElement.getVariant(key);
variant && setTarget(visualElement, variant);
if (visualElement.variantChildren) {
visualElement.variantChildren.forEach((child) => {
setVariants(child, variantLabels);
});
}
});
}
function setValues(visualElement, definition) {
if (Array.isArray(definition)) {
return setVariants(visualElement, definition);
}
else if (typeof definition === "string") {
return setVariants(visualElement, [definition]);
}
else {
setTarget(visualElement, definition);
}
}
/**
* @public
*/
function animationControls() {
/**
* Track whether the host component has mounted.
*/
let hasMounted = false;
/**
* A collection of linked component animation controls.
*/
const subscribers = new Set();
const controls = {
subscribe(visualElement) {
subscribers.add(visualElement);
return () => void subscribers.delete(visualElement);
},
start(definition, transitionOverride) {
invariant(hasMounted, "controls.start() should only be called after a component has mounted. Consider calling within a useEffect hook.");
const animations = [];
subscribers.forEach((visualElement) => {
animations.push(animateVisualElement(visualElement, definition, {
transitionOverride,
}));
});
return Promise.all(animations);
},
set(definition) {
invariant(hasMounted, "controls.set() should only be called after a component has mounted. Consider calling within a useEffect hook.");
return subscribers.forEach((visualElement) => {
setValues(visualElement, definition);
});
},
stop() {
subscribers.forEach((visualElement) => {
stopAnimation(visualElement);
});
},
mount() {
hasMounted = true;
return () => {
hasMounted = false;
controls.stop();
};
},
};
return controls;
}
export { animationControls, setValues };
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