<!-- Do not edit this file. It is automatically generated by API Documenter. --> [Home](./index.md) > [puppeteer](./puppeteer.md) > [ConnectionTransport](./puppeteer.connectiontransport.md) > [onclose](./puppeteer.connectiontransport.onclose.md) ## ConnectionTransport.onclose property <b>Signature:</b> ```typescript onclose?: () => void; ```