--- sidebar_label: makeProgressCallback --- # makeProgressCallback() function #### Signature: ```typescript export declare function makeProgressCallback( browser: Browser, buildId: string ): (downloadedBytes: number, totalBytes: number) => void; ``` ## Parameters <table><thead><tr><th> Parameter </th><th> Type </th><th> Description </th></tr></thead> <tbody><tr><td> browser </td><td> [Browser](./browsers.browser.md) </td><td> </td></tr> <tr><td> buildId </td><td> string </td><td> </td></tr> </tbody></table> **Returns:** (downloadedBytes: number, totalBytes: number) => void