@itwin/itwinui-react/esm/utils/hooks/useInstance.js

A react component library for iTwinUI

import * as React from 'react';
import { useSyncExternalStore } from './useSyncExternalStore.js';
class Instance {}
export const useInstance = () => React.useMemo(() => new Instance(), []);
export const useSynchronizeInstance = (instance, properties) => {
  let synchronize = React.useCallback(() => {
    if (!(instance instanceof Instance)) return () => {};
    Object.assign(instance, properties);
    return () => {
      for (let key in properties) delete instance[key];
    };
  }, [instance, properties]);
  return useSyncExternalStore(
    synchronize,
    () => instance,
    () => instance,
  );
};