How to pass parameters to an API url from JS

Hello i have this api url

http://127.0.0.1:8000/api/outlay

that brings default values now i want to add filters to this url i tried to follow the example of postman that does it like this:

http://127.0.0.1:8000/api/outlay?startdate=2023-02-14&enddate=2023-02-15

This is what i tried but didnt work:

http://127.0.0.1:8000/api/outlay?startdate='startdateOutlay'&enddate='enddateOutlay'

The startdateOutlay and enddateOutlay are calendar input that change value dynamically, is it possible to do such a thing from Javascript?

You can use template string ``

const apiUrl = `http://127.0.0.1:8000/api/outlay?startdate=${startdateOutlay}&enddate=${enddateOutlay}`;