Generate PDFs from javascript project file instead of CLI

Question: I know this specifically says it's a CLI tool, but is it possible to generate PDFs from a javascript file within the project instead (i.e. what the BrowserWindow loads)? I ask because my Electron app dynamically configures information based on the user's selections and then compiles a summary report PDF once an event is triggered by the user. Additionally, the app will be packaged with electron-packager.

Thank you!