FormData methods in JavaScript

So FormData obtains the form data in an ordered way. This is usually needed to send this data to a server using JavaScript. At the same time, FormData has special methods that allow you to retrieve and modify form data.

These methods are the same as in : get, set, has, append, delete, getAll

Modify the previous task. After getting the form data, add another key-value pair to that data and remove one of the existing pairs.