How to create a local server for project testing from Create React App?

Question

Node.js

I ran into such a problem, I'm learning react, I want my project from the Create React App environment to send GET, POST requests, etc. to a local server, such as OpenServer, and receive responses from it. I use the axios library to generate requests.
So, I created a host on OpenServer, posted a JSON file that comes as a response to a GET request. I checked POSTMAN, everything is OK, the object comes from the file that is needed. But when trying to get a response to a request via axios, it gives an error Access to XMLHttpRequest at ' webserver/db.json ' from origin ' localhost:3000' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. As I understand it, the browser (I use Yandex) or OpenServer are prohibited from sending / receiving requests from one local server to another
. I tried to create it separately using the json-server library in Node.js, but when I started it, the server from react create app crashed, and turnover

Answer 1

to do this, run express with cors

Answer 2

Hello, in your case, you have a CORS error, google for keywords. "open server cors".
And in general, study the question of what CORS is and why it is needed.