<!-- Do not edit this file. It is automatically generated by API Documenter. --> [Home](./index.md) > [puppeteer](./puppeteer.md) > [MouseWheelOptions](./puppeteer.mousewheeloptions.md) > [deltaY](./puppeteer.mousewheeloptions.deltay.md) ## MouseWheelOptions.deltaY property <b>Signature:</b> ```typescript deltaY?: number; ```