How the correct url of my server is picked when making GET request, when in console.log I see only empty string?

Using create-react-app, webpack4.3, axios

I have console logged process.env.PUBLIC_URL in both server and browser, but all I see is "". Then, how the correct url of my server is picked when making GET request, when in console.log I see only empty string?

I see the correct url in Network tabs of developer tools.

In create-react-app docs about environment variables they have mentioned this two times

>Note: You must create custom environment variables beginning with REACT_APP_. Any other variables except NODE_ENV will be ignored to avoid accidentally exposing a private key on the machine that could have the same name

so the weirdest part is when log process.env.PUBLIC_URL and its is "" and not undefined.

but your requests work as expected while rocess.env.PUBLIC_URL is an empty string so the only thing I can think of is that you had set a proxy with the base URL string in your package.json file.<br>

"proxy": "http://localhost:4000",

>To tell the development server to proxy any unknown requests to your API server in development, add a proxy field to your package.json <br>
>This way, when you fetch('/api/todos') in development, the development server will recognize that it’s not a static asset, and will proxy your request to http://localhost:4000/api/todos as a fallback.

feel free to downvote this, I also think it should be a comment, but you know, it can't.