Heroku pipeline - staging env variable carried into production

Question

I\'ve recently deployed a React/Express app to Heroku, but I\'m having an issue with environment variables that are part of the built app and the Heroku deployment pipeline

Answer 1

You cannot rebuild the slug, the main point of pipelines is to move the same slug between apps.

What you need to do is to fetch API_URL at runtime and not during build process. You can put all envs in one file, for example env.js

export const API_URL = process.env.API_URL;
export const OTHER_VAR = process.env.OTHER_VAR;

And then just import what you need in other files

import { API_URL, OTHER_VAR } from 'env.js';