What is the easiest way to make saving div as pdf and png for application?

Question

PHP

There is a ReactJS application with a section on d3.js that generates reports and graphs (PHP backing).
You need to save a separate div in two formats of your choice pdf and png.
How can this be done in the easiest way and where on the user side or on the server?
The important point is to save css formatting for the block.

Answer 1

there are several libs:
https://github.com/MrRio/jsPDF
pdfkit.org
pdfmake.org

Answer 2

I know that it is possible to save the block in png on the client side, but what would be in pdf is unlikely. Dig towards the backend, there are special libraries