Based on the benefits and best practices outlined in this paper, we recommend:
Most modern build tools follow a specific precedence order when loading environment variables from files. A typical hierarchy (from lowest to highest priority) looks like this: .env.development.local
Most frameworks follow a strict order of precedence when loading these files. If a variable is defined in multiple places, the most "specific" one wins: (Highest priority for development) .env.local .env.development .env (Lowest priority/fallback) Key Characteristics Based on the benefits and best practices outlined
There is a common pitfall: forgetting that .env.development.local exists. You add API_URL=https://production-api.com to .env.development.local for a one-time test. A week later, you are debugging why your local app is hitting production. You forgot you left the override in place. Solution: rm .env.development.local or use git status to see untracked files regularly. You add API_URL=https://production-api
: This file is intended for your machine only. It should never be committed to version control (like Git). You should always ensure it is listed in your .gitignore file.
"version": "2.0.0", "tasks": [
: Its primary role is to override default variables defined in .env or .env.development .
