[**Kvaser CanKing GUI Extensions SDK v7.5.1**](../../README.md)

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[Kvaser CanKing GUI Extensions SDK](../../modules.md) / [hooks](../README.md) / useSessionData

# Function: useSessionData()

> **useSessionData**\<`T`\>(`id`, `defaultValue`, `loadedCallback?`): `object`

A hook for data that should be saved to the session data.

## Type Parameters

### T

`T`

## Parameters

### id

`number`

The unique id of the view.

### defaultValue

The default value or a function that returns the default value.

`T` | () => `T`

### loadedCallback?

(`value`) => `void`

Optional callback invoked once after data is loaded.

## Returns

`object`

An object with the current session data, a setter, and an initialization flag.

### sessionData

> **sessionData**: `T`

### sessionDataIsInitialized

> **sessionDataIsInitialized**: `boolean`

### setSessionData

> **setSessionData**: `Dispatch`\<`SetStateAction`\<`T`\>\>