[Home](./index.md) > [bitburner](./bitburner.md) > [NS](./bitburner.ns.md) > [alert](./bitburner.ns.alert.md) ## NS.alert() method Open up a message box. Signature: ```typescript alert(msg: string): void; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | msg | string | Message to alert. | Returns: void