Env Variables & Config Organization
Create a tiny config layer: read env vars, provide safe defaults, and switch by NODE_ENV/APP_ENV. Never ship secrets to the browser.
Why a config layer?
Goal: Centralize config and keep secrets out of the client bundle.
- Safe defaults
- Per-environment overrides
- Only expose public keys
Config checklist
- Define a config object
- Switch by environment flag (e.g., development/production)
- Provide defaults for missing vars
- Never ship secrets (tokens, keys)
All lessons in this course
- ESLint + React Rules; Prettier Integration
- File Naming, Component Boundaries, Prop Naming
- Env Variables & Config Organization