.env.local.production -

Without .env.production.local (or .env.local.production ), you would need to deploy to staging every time you test a change. With the file, you run:

But as applications grow in complexity, a new, slightly intimidating file name has started appearing in boilerplates and advanced configuration guides: .

At first glance, it looks like a typo. Is it local? Is it production? Why would you need both? If you’ve stumbled upon this file or are considering implementing it, this guide is for you.

# Correct .env.local .env.*.local .env.local.production .env.*

"scripts": "build:prod-local": "NODE_ENV=production node env-loader.js && npm run build"

console.log( ✅ Loaded env from: $nodeEnv mode ); // package.json

The difference is purely syntactical. Most modern frameworks prefer the former ( env.production.local ), but legacy systems or custom CI/CD pipelines might recognize the latter. If you have .env and .env.production , why introduce a third file? The answer lies in sensitive, environment-specific configuration .

However, due to developer confusion or legacy configuration scripts, you will occasionally find the inverted version: .

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Without .env.production.local (or .env.local.production ), you would need to deploy to staging every time you test a change. With the file, you run:

But as applications grow in complexity, a new, slightly intimidating file name has started appearing in boilerplates and advanced configuration guides: .

At first glance, it looks like a typo. Is it local? Is it production? Why would you need both? If you’ve stumbled upon this file or are considering implementing it, this guide is for you.

# Correct .env.local .env.*.local .env.local.production .env.*

"scripts": "build:prod-local": "NODE_ENV=production node env-loader.js && npm run build"

console.log( ✅ Loaded env from: $nodeEnv mode ); // package.json

The difference is purely syntactical. Most modern frameworks prefer the former ( env.production.local ), but legacy systems or custom CI/CD pipelines might recognize the latter. If you have .env and .env.production , why introduce a third file? The answer lies in sensitive, environment-specific configuration .

However, due to developer confusion or legacy configuration scripts, you will occasionally find the inverted version: .