Node.js CLI

Node.js CLI cheat sheets for runtime flags, debugging, watch mode, test runner, environment variables, and production execution patterns.

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## Basics and Invocation

Print Node version

node --version

# Show the current Node.js version.

Show CLI help

node --help

# Print built-in CLI help.

Print V8 options

node --v8-options

# List V8 engine flags.

Run a script file

node app.js

# Execute a JavaScript entry file.

Execute inline JavaScript

node -e "console.log(process.version)"

# Run a one-liner directly from the shell.

Print expression result

node -p "process.platform + ' ' + process.arch"

# Evaluate an expression and print its result.

Run script from stdin

echo "console.log('hello from stdin')" | node -

# Feed JavaScript to Node from standard input.

Syntax check a file

node --check app.js

# Validate syntax without executing the program.

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