25 lines
706 B
JavaScript
25 lines
706 B
JavaScript
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const notify = (node) => !node.isLayoutDirty && node.willUpdate(false);
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function nodeGroup() {
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const nodes = new Set();
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const subscriptions = new WeakMap();
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const dirtyAll = () => nodes.forEach(notify);
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return {
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add: (node) => {
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nodes.add(node);
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subscriptions.set(node, node.addEventListener("willUpdate", dirtyAll));
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},
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remove: (node) => {
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nodes.delete(node);
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const unsubscribe = subscriptions.get(node);
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if (unsubscribe) {
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unsubscribe();
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subscriptions.delete(node);
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}
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dirtyAll();
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},
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dirty: dirtyAll,
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};
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}
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export { nodeGroup };
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