was sending it from a node app to the frint end react app and was told when you send info you need to turn it into a JSON string first and then parse that string the other end
Commonly, but not always e.g.
If you’ve got the PDF data back to the client then you’ve covered all that you’ll want to ask on this forum. You’re just on to “handling data using js” at that point.
For rendering there’s plenty you could use e.g. PDF.js - Home