SubscribeFunction type

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SubscribeFunction type

Subscribe function type - tracks source dependencies, calls callback on change.

Signature:

export type SubscribeFunction = {
    <T = unknown>(source: () => T, callback: SubscribeCallback<T>): UnsubscribeFunction;
};

References: SubscribeCallback, UnsubscribeFunction

Example

const unsubscribe: UnsubscribeFunction = subscribe(
  () => count(),           // source: tracked
  (value) => log(value)    // callback: NOT tracked
);