> [!NOTE] > **Important:** This API works **only on ChromeOS**.

## Description Use the `chrome.loginState` API to read and monitor the login state.

## Permissions `loginState`

## Availability Chrome 78+ browser.\* since Chrome 148 ChromeOS only


## Types ### ProfileType #### Enum "SIGNIN_PROFILE" Specifies that the extension is in the signin profile. "USER_PROFILE" Specifies that the extension is in the user profile. "LOCK_PROFILE" Specifies that the extension is in the lock screen profile.
### SessionState #### Enum "UNKNOWN" Specifies that the session state is unknown. "IN_OOBE_SCREEN" Specifies that the user is in the out-of-box-experience screen. "IN_LOGIN_SCREEN" Specifies that the user is in the login screen. "IN_SESSION" Specifies that the user is in the session. "IN_LOCK_SCREEN" Specifies that the user is in the lock screen. "IN_RMA_SCREEN" Specifies that the device is in RMA mode, finalizing repairs.
## Methods ### getProfileType() ```typescript browser.loginState.getProfileType(): Promise ``` Gets the type of the profile the extension is in. #### Returns - Promise\<[ProfileType](https://developer.chrome.com/docs/extensions/reference/api/loginState#type-ProfileType)\> Chrome 96+ browser.\* since Chrome 148 ### getSessionState() ```typescript browser.loginState.getSessionState(): Promise ``` Gets the current session state. #### Returns - Promise\<[SessionState](https://developer.chrome.com/docs/extensions/reference/api/loginState#type-SessionState)\> Chrome 96+ browser.\* since Chrome 148 ## Events ### onSessionStateChanged ```typescript browser.loginState.onSessionStateChanged.addListener(   callback: function, ) ``` Dispatched when the session state changes. `sessionState` is the new session state. #### Parameters - callback function The `callback` parameter looks like: ```typescript (sessionState: SessionState) => void ```
- sessionState [SessionState](https://developer.chrome.com/docs/extensions/reference/api/loginState#type-SessionState)