.env.local !free! -

Never, under any circumstances, commit .env.local . Why?

It loads .env , then .env.local , then .env.[mode] (e.g., .env.development ), then .env.[mode].local .

The standard solution across the web development ecosystem is using environment variables. Among the various configuration files you might encounter, .env.local plays a specific and crucial role. .env.local

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Because you explicitly load .env.local second (with override: true ), it overwrites the default .env values. Never, under any circumstances, commit

At its core, an .env.local file is a plain-text file that stores for local development (e.e., DATABASE_URL=postgres://localhost:5432/mydb ). This file allows you to override variables defined in a base .env file or to add machine‑specific secrets without affecting team‑wide configuration.

Your .gitignore file should explicitly contain: The standard solution across the web development ecosystem

Environment-specific files loaded based on the current running mode of your application.

Environment variables are read when the application server boots up. If you add or modify a variable in .env.local while your local server is running, the app will not see it.

: Loaded only during local development. It has the highest priority. Why does .env.local override everything else?

require('dotenv').config( path: '.env.local' ); console.log(process.env.API_URL); Use code with caution.