While Python doesn't have a built-in .env parser, the python-decouple or django-environ libraries allow you to mimic the pattern. You manually load files based on DJANGO_SETTINGS_MODULE .
Frontend frameworks must compile and bundle code before sending it to a user's browser. Browsers do not have a process.env object. To prevent accidental exposure of backend secrets, frontend tools require a specific prefix for variables intended for browser use. Required Prefix Code Access Syntax VITE_ import.meta.env.VITE_API_URL Next.js NEXT_PUBLIC_ process.env.NEXT_PUBLIC_API_URL Create React App REACT_APP_ process.env.REACT_APP_API_URL Nuxt NUXT_PUBLIC_ useRuntimeConfig().public.apiUrl
# .gitignore - ignore sensitive and personal files .env .env.local .env.*.local
Now, running docker-compose up automatically injects your dev variables. .env.development
Different frameworks have adopted the .env.development pattern with their own conventions.
| File Name | Typical Usage | | :--- | :--- | | .env | The fallback or default file. Contains base variables. | | | Loaded specifically during local development ( npm start or dev ). | | .env.production | Loaded when the app is built for production. | | .env.test | Loaded during unit/integration testing (e.g., Jest). |
If you are just starting a new project, setting up your .env files correctly—and ensuring they are ignored by Git—is one of the most important first steps. While Python doesn't have a built-in
New developers can simply duplicate this file, rename it to .env.development , and fill in their local values. 2. Know When to Commit to Git
If you'd like to share (e.g., Next.js, Create React App, Vue), I can provide the exact naming conventions for your environment variables!
If the file only contains non-sensitive data—such as pointing to http://localhost:8080 , local mock servers, or public sandbox API keys shared by the entire team—it is safe and recommended to commit it. It streamlines the onboarding process for new developers. Browsers do not have a process
# Good examples DATABASE_URL= API_BASE_URL= FEATURE_FLAG_ENABLE_NEW_DASHBOARD= SERVICE_RATE_LIMIT=
This comprehensive guide explores everything you need to know about .env.development , how it works across various popular frameworks, and best practices for secure and efficient local environment management. What is .env.development?
: This is a security vulnerability that can expose API keys and database credentials to the entire world if your repository becomes public.
Angular often uses Node scripts to read these files and override environment.ts files [Read environment variables from .env file in Angular, 2026]. Best Practices and Security Tips 1. Always Use .gitignore