Developer Alice, who is working on a feature that requires a local mock server, can create .env.development.local with:
Variables intended for the browser must be prefixed with NEXT_PUBLIC_ : NEXT_PUBLIC_API_URL=https://localhost:3000 2. Vite (React, Vue, Svelte)
The structure of the .env.development.local filename follows a highly specific cascading taxonomy:
Before you even create a .local file, verify that your project's .gitignore file includes it. Most modern project initializers (like create-next-app or npm create vite@latest ) include this by default, but it is always safe to check. Your .gitignore should contain lines like: .env*.local Use code with caution. 2. Provide a .env.example File
const required = ['API_KEY', 'DATABASE_URL']; const missing = required.filter(key => !content.includes( $key= ));
In essence, .env.development.local is a file for .
cp .env.example .env.development.local
: It is only loaded when the environment variable NODE_ENV is set to development . Comparison of File Priorities
To get the most out of .env.development.local , follow these best practices:
