--- sidebar_label: launch --- # launch() function #### Signature: ```typescript launch: ( options?: | import('puppeteer-core/internal/puppeteer-core.js').PuppeteerLaunchOptions | undefined ) => Promise<import('puppeteer-core/internal/puppeteer-core.js').Browser>; ``` ## Parameters <table><thead><tr><th> Parameter </th><th> Type </th><th> Description </th></tr></thead> <tbody><tr><td> options </td><td> import("puppeteer-core/internal/puppeteer-core.js").[PuppeteerLaunchOptions](./puppeteer.puppeteerlaunchoptions.md) \| undefined </td><td> _(Optional)_ </td></tr> </tbody></table> **Returns:** Promise<import("puppeteer-core/internal/puppeteer-core.js").[Browser](./puppeteer.browser.md)>