The types via `node_modules/bowser/index.d.ts` aren't extremely useful Most variables are just `string` rather than explaining what the actual values could be (eg `'MacOS' | 'Windows'` or `'macos' | 'windows'`) I believe the source code probably has explicit values for these, and that the types could be defined better: ``` const BROWSER_MAP: Record<string, string>; const ENGINE_MAP: Record<string, string>; const OS_MAP: Record<string, string>; const PLATFORMS_MAP: Record<string, string>; ```