> For the complete documentation index, see [llms.txt](https://inside-scripts.gitbook.io/documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://inside-scripts.gitbook.io/documentation/free-scripts/bridge-and-library/functions/library/callback/client.md).

# Client

## <mark style="color:green;">Callback</mark>

### Usage

```lua
Lib.Callback(event, callback, ...)
```

* event: `string`
* callback: `function`
* ...: `any`

### Example

```lua
Lib.Callback("example:doubleNumber", function(response)
    print("Double Number is " .. response)
end, 15)
```