var cache = new jfetchs.Cache({
  debug: 'localhost',
  expire: 60, // 60 seconds
  fetch: () => {
    return Promise.resolve(Date.now())
  },
})

cache.fetch().then(data => {
  console.log(data)
})

/**
 * 获取数据 Fetch cached data
 * @param key 缓存标志，默认: ''
 */
Cache.fetch(key?: string) {}

/**
 * 移除缓存 Remove cached data
 * @param key 缓存标志，默认: ''
 */
Cache.flush(key?: string) {}