Function cachePlugin

Returns FetchPlugin<H, P, S> & {
    flight: SingleFlight<unknown>;
    policy: CachePolicy<S, H, P>;
    clearCache(): void;
    clearCacheKey(key: string): Promise<boolean>;
    deleteCache(key: string): Promise<boolean>;
    invalidateCache(predicate: (key: string) => boolean): Promise<number>;
    invalidatePath(
        pattern: string | RegExp | ((key: string) => boolean),
    ): Promise<number>;
    stats(): { cacheSize: number; inflightCount: number };
}

Object with FetchPlugin interface plus cache management methods

const cache = cachePlugin({ ttl: 300000, staleIn: 60000 });
    const api = new FetchEngine({
        baseUrl: 'https://api.example.com',
        plugins: [cache]
    });

    // Access cache methods directly on the plugin
    cache.clearCache();
    cache.stats();
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