.env.development.local 2021 Jun 2026

You should commit secret keys to a public or private Git repository. Because .env.development.local is intended to be ignored by Git, it is the safest place to put your personal API keys while testing code locally. 2. Tailoring to Your Local Machine (Personalization)

| Practice | Implementation | Risk if Ignored | |---|---|---| | Add *.local to .gitignore | Add .env*.local to the project's .gitignore file | Secrets and personal configs are committed to repository | | Use .env.example as a template | Create .env.example listing all variables (empty values) | New team members don't know which variables to define | | Never commit .env*.local | Double-check before committing; use git status | Exposure of sensitive data in version control history | | Restrict file permissions | Use chmod 600 .env*.local on Unix systems | Other users on shared machines can read sensitive values | | Validate required variables at startup | Implement schema validation (e.g., with Zod) | App crashes unexpectedly due to missing variables |

From to lowest priority , the hierarchy typically looks like this: .env.development.local

# Local Database Connection DB_HOST=localhost DB_PORT=5433 DB_USER=my_local_user

By placing your local database URL inside .env.development.local , your app will use your personal local database without affecting or changing the shared .env.development file. Security and .gitignore You should commit secret keys to a public

Environment variables are injected into your application when the process starts. If you modify a value inside .env.development.local , the changes will not take effect automatically through hot-module reloading. You your development server (e.g., cancel the terminal process and run npm run dev again). Pitfall 3: Mixing Client and Server Secrets

VITE_API_BASE_URL=http://localhost:3000 VITE_APP_TITLE="My App (Dev Local)" Tailoring to Your Local Machine (Personalization) | Practice

"type": "node", "request": "launch", "name": "Launch with .env.development.local", "envFile": "$workspaceFolder/.env.development.local"

Every developer on a team might have a slightly different local setup. For example: Developer A might run their local database on port 5432 . Developer B might run their local database on port 5433 .

Because these files often contain sensitive secrets—such as private access tokens, passwords, or local paths—they should always be included in the project's .gitignore file. To help other developers know which variables they need to define, it is standard practice to provide a "template" file, such as .env.example , which contains the variable names but none of the actual secret values. Loading Order

The filename .env.development.local is broken down by its structural hierarchy: