OfficeJS PowerPoint question about Slide properties

Question

It seems to me that officeJS powerpoint API is quite limited. Is there a way to get properties of a slide? For example, getting the height and width of a slide?

I have tried

 let parentSlide = shape.getParentSlide().load()
 await context.sync()
 console.log(parentSlide)

but I also can't even see the results from console.log