Yeah the whole paragraph is worded poorly. IMO it reads either one of these scenarios: 1) A library that dynamically generated JS for him instead of writing it

Yeah the whole paragraph is worded poorly. IMO it reads either one of these scenarios: 1) A library that dynamically generated JS for him instead of writing it himself. So probably some scaffolding tool. 2) Server side was returning HTML and not JS But TBH I didn't really get the paragraphs meaning