[Home](./index.md) > [puppeteer](./puppeteer.md) > [Page](./puppeteer.page.md) > [\_onDialog](./puppeteer.page._ondialog.md) ## Page.\_onDialog() method Signature: ```typescript _onDialog(event: Protocol.Page.javascriptDialogOpeningPayload): void; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | event | Protocol.Page.javascriptDialogOpeningPayload | | Returns: void