[Home](./index.md) > [@firebase/auth](./auth.md) > [Persistence](./auth.persistence.md) > [type](./auth.persistence.type.md) ## Persistence.type property Type of Persistence. - 'SESSION' is used for temporary persistence such as `sessionStorage`. - 'LOCAL' is used for long term persistence such as `localStorage` or `IndexedDB`. - 'NONE' is used for in-memory, or no persistence. Signature: ```typescript readonly type: 'SESSION' | 'LOCAL' | 'NONE'; ```