warn
it is developing, not release version, please don't use it in production environment.
此类库正在开发中，目前还没有release，请勿在正式环境中使用 此类库的设定为给予store.js,扩展出具有多种缓存策略的本地存储的类库
store.ext [english]
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store.ext is base store.js [https://www.npmjs.com/package/store]
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store.ext with cache strategy
- read count
- expire time