How to fix ReferenceError: func is not defined on js (Vue)?

Question

JavaScript

I can't send a "post" request to get data from the database

fixed with jsonp, but it gives the following error,

how can I fix it?
Is the problem on the front side or the back side?

Answer 1

You need to dig towards CORS.
The server you are accessing must allow requests from external domains. And the software that makes such requests must pass the appropriate data for CORS