<!-- Do not edit this file. It is automatically generated by API Documenter. --> [Home](./index.md) > [puppeteer](./puppeteer.md) > [LaunchOptions](./puppeteer.launchoptions.md) > [env](./puppeteer.launchoptions.env.md) ## LaunchOptions.env property Specify environment variables that will be visible to the browser. <b>Signature:</b> ```typescript env?: Record<string, string | undefined>; ```