Best practice to switch between development and production urls when using Vue/Vite and Django

I want to build a website with Vue/Vite as frontend and Django as a backend.
When my frontend needs to get data from the backend I currently do something like this (which works perfectly fine):
const response = await fetch('http://localhost:8000/api/register', {...

But for a production environment I (probably?) want something like this to be able to switch between dev and prod without manually changing every url:
const response = await fetch(backend_url + '/register', {...

My Question is, what is the best/standard way to setup this backend_url in Vue/Vite?

Kind regards
feps

My Search so far:
Vue has a provide/inject feature which could be used to define a gloable Variables in my App.vue file.
Vite has "Shared options" defined in vite.config.js
But for both options I was unable to find any example, which leaves me wondering if there is another option which I was unable to find, which is used to solve this "problem".

The best practice would be to implement the following:

  1. Abstract your VueJS calls to the backend in a utility file that you import in your components. This will allow for a "single point of control" scenario where the backend URL is only defined in one spot

    Example:

    /util/api.js

    /*
 * Required Types
 *
 * url: String
 * method: String
 * headers: Object
 * body:
 * query: [{'key': 'value'}, {'key': 'value'}... ]
 * onFailure: Function
 */
export const httpRequest = async (params) => {
  let { url_endpoint, method, headers, body, query, onFailure } = params;
  let url = ""

  // utilize Vite's environment variables to detect mode
  if (import.meta.env.MODE === "development") {
    url = "http://localhost:8000" + url_endpoint;
    requestCredentials = "include";
  } else if (import.meta.env.MODE === "production"){
    // TODO: Define production URL
  }
  // append query params to url
  if (Array.isArray(query) && query.length) {
    url += "?";
    query.forEach(
      (q) => (url += `${Object.keys(q)[0]}=${Object.values(q)[0]}&`),
    );
  }

  try {
    return await fetch(url, {
      method: method,
      credentials: requestCredentials,
      headers: headers,
      body: body,
    });
  } catch(e) {
    console.error(e)
    return onFailure()
  }

  2. Import your httpRequest helper method in your VueJS file and interact with your backend as desired.

    /views/HomeView.vue

    <script setup>
import { httpRequest } from "@/util/api.js";
const res = await httpRequest({
  url_endpoint: "/api/register",
  method: "GET",
  onFailure: () => console.error("Could not fetch register"),
});
</script>

  3. Bonus: Configure alias paths in vite.config.js

    import { fileURLToPath, URL } from "node:url";

import { defineConfig } from "vite";
import vue from "@vitejs/plugin-vue";

// https://vitejs.dev/config/
export default defineConfig({
  server: {},
  plugins: [vue()],
  resolve: {
    alias: {
      "@": fileURLToPath(new URL(".", import.meta.url)),
    },
  },
});
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