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32 lines
883 B
TypeScript
32 lines
883 B
TypeScript
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export declare class ObservableMap<K, V> extends Map<K, V> {
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private readonly listener;
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constructor(listener: (map: ObservableMap<K, V>) => void, init?: Iterable<Readonly<[K, V]>>);
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set(key: K, value: V): this;
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delete(key: K): boolean;
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clear(): void;
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}
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/**
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* Create and return a [Map](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map) that triggers rerenders when it's updated.
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*
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* ```tsx
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* const customerAges = useMap<number>([
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* ['john', 24],
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* ['betsy', 25]
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* ]);
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*
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* return (
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* <>
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* {Array.from(ids, ([name, age]) => (
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* <div>
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* {name}: {age}. <button onClick={() => ids.delete(name)}>X</button>
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* </div>
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* )}
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* </>
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* )
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* ```
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*
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* @param init initial Map entries
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*/
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declare function useMap<K, V>(init?: Iterable<Readonly<[K, V]>>): ObservableMap<K, V>;
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export default useMap;
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