TutorialsArena

Node.js Command-Line Options: Controlling Execution and Behavior

Master Node.js execution with this guide to command-line options. Learn how to control various runtime settings, manage script execution, and leverage Node.js's flexibility through command-line arguments for enhanced development and debugging.

Node.js Command Line Options

Node.js offers various command-line options to control its execution and behavior. These options provide flexibility in running scripts and managing runtime settings.

List of Node.js Command Line Options

Index Option Description
1 v, --version Prints the Node.js version.
2 -h, --help Prints a list of available command-line options.
3 -e, --eval "script" Evaluates the provided JavaScript code. Predefined REPL modules are accessible.
4 -p, --print "script" Similar to --eval, but prints the result to the console.
5 -c, --check Performs a syntax check on the script without executing it.
6 -i, --interactive Opens the REPL (Read-Eval-Print Loop) even if input isn't from a terminal.
7 -r, --require module Preloads the specified module at startup. Uses require()'s module resolution rules.
8 --no-deprecation Suppresses deprecation warnings.
9 --trace-deprecation Prints stack traces for deprecation warnings.
10 --throw-deprecation Throws errors for deprecation warnings.
11 --no-warnings Suppresses all warnings (including deprecations).
12 --trace-warnings Prints stack traces for all warnings.
13 --trace-sync-io Prints stack traces when synchronous I/O is detected after the event loop starts.
14 --zero-fill-buffers Zero-fills newly allocated buffer instances.
15 --track-heap-objects Tracks heap object allocations for heap snapshots.
16 --prof-process Processes V8 profiler output (from the V8 --prof option).
17 --v8-options Prints available V8 command-line options.
18 --tls-cipher-list=list Specifies a custom TLS cipher list (requires crypto support).
19 --enable-fips Enables FIPS-compliant cryptography (requires specific build options).
20 --force-fips Forces FIPS-compliant cryptography (cannot be disabled in code).
21 --icu-data-dir=file Specifies the ICU data load path.

Examples

Here are some example usages:

  • Show Node.js version: node -v or node --version
  • Get help: node -h or node --help
  • Evaluate a script (without printing): node -e "console.log('Hello');"
  • Evaluate and print: node -p "1+1"
  • Open REPL: node -i or node --interactive