Node.js CLI Environment & Config

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Node.js CLI environment and config cheat sheets for NODE_OPTIONS, runtime environment variables, proxy settings, CA certificates, and launch patterns.

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## Environment Variables and NODE_OPTIONS

Preload with NODE_OPTIONS

↗#

NODE_OPTIONS="--require dotenv/config" node app.js

# Apply CLI flags through the environment.

Run with NODE_ENV=production

↗#

NODE_ENV=production node app.js

# Set common production mode.

Suppress warnings

↗#

NODE_NO_WARNINGS=1 node app.js

# Disable warning output.

Set timezone

↗#

TZ=UTC node app.js

# Run process in a chosen timezone.

Set libuv threadpool size

↗#

UV_THREADPOOL_SIZE=16 node app.js

# Tune worker threadpool size.

Add extra CA certificates

↗#

NODE_EXTRA_CA_CERTS=./internal-ca.pem node app.js

# Trust additional certificate authorities.

Honor HTTP proxy env vars

↗#

NODE_USE_ENV_PROXY=1 node app.js

# Tell Node to use HTTP_PROXY and related vars.

Use system CA store

↗#

NODE_USE_SYSTEM_CA=1 node app.js

# Load trusted CA certs from the OS store.

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