Correct work with data in the form through AJAX - render the form every time or fill the existing form with the received data?

Question

JavaScript

Hello! Share your opinion on how to correctly work with data in the form using AJAX - render the form each time upon request or fill an existing form with the received data (json).

The site is single-page, that is, in fact, all the work is carried out within one page.

Thank you!

Answer 1

Easy to fill