# WorldClass.client_onUpdate

Called every frame.

**Kind:** Callback

**Environments:** Game

## Game

**Callback side:** Client

``` { .lua .api-signature }
WorldClass:client_onUpdate( deltaTime )
```

[Open the full Game reference](../Game-Script-Environment/Classes/WorldClass.md#client_onupdate)

During a frame update, graphics, animations and effects are updated.

> **Warning:**
> Because of how frequent this event is called, the game's frame rate is greatly affected by the amount of code executed here.
> For any non-graphics related code, consider using [client_onFixedUpdate](../Game-Script-Environment/Classes/WorldClass.md#client_onfixedupdate) instead.
> If the event is not in use, consider removing it from the script. (Event callbacks that are not implemented will not be called.)

**Parameters:**

| Name | Type | Description |
| --- | --- | --- |
| `self` | table | The class instance. |
| `deltaTime` | number | Delta time since the last frame. |