ushio-session is the predecessor of js-session, built in [iotcat/ushio-js](https://github.com/iotcat/ushio-js). On the basis of using [iotcat/fp](https://github.com/iotcat/fp) to locate the device, front-end users can use sessions like cookies. The session does not depend on cookies and uses server-side storage. Because of this feature, **session can solve cross-domain problems that cookies are difficult to solve**.
ushio-session has now been widely used in the ushio website system. You have ushio-session support behind many of the services on the websites supported by Ushio. such as:
- Cross-domain and cross-device music continues to play
- User management identification
- Language preference record
- Video playback position is recorded across devices