Function cacheStatus

packages/service-worker/worker/src/assets.ts:86–103

(url: string)

  }

  async cacheStatus(url: string): Promise<UpdateCacheStatus> {
    const cache = await this.cache;
    const meta = await this.metadata;
    const req = this.adapter.newRequest(url);
    const res = await cache.match(req, this.config.cacheQueryOptions);
    if (res === undefined) {
      return UpdateCacheStatus.NOT_CACHED;
    }
    try {
      const data = await meta.read<UrlMetadata>(req.url);
      if (!data.used) {
        return UpdateCacheStatus.CACHED_BUT_UNUSED;
      }
    } catch (_) {
      // Error on the side of safety and assume cached.
    }
    return UpdateCacheStatus.CACHED;
  }

  /**
   * Initialize this asset group, updating from the given source if available.