.env.development May 2026

The next time you start a new project, don't leave your team to guess which variables they need. Write the .env.development file first—and watch your onboarding friction disappear.

The .env.development file is a used exclusively when your application runs in a development environment. .env.development

| 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). | The next time you start a new project,

// package.json