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import { useEffect } from 'react';
import { assert } from 'tsafe';
const IDS = new Set<string>();
/**
* Asserts that there is only one instance of a singleton entity. It can be a hook or a component.
* @param id The ID of the singleton entity.
*/
export function useAssertSingleton(id: string) {
useEffect(() => {
assert(!IDS.has(id), `There should be only one instance of ${id}`);
IDS.add(id);
return () => {
IDS.delete(id);
};
}, [id]);
}
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