node man page

node — Server-side JavaScript runtime


node {{file}}.js


node -e "{{code}}"


node [options] [v8 options] [script.js | -e "script"] [arguments]
node debug [script.js | -e "script" | <host>:<port>] ...
node [--v8-options]

Execute without arguments to start the REPL.


Node.js is a set of libraries for JavaScript which allows it to be used outside of the browser. It is primarily focused on creating simple, easy to build network clients and servers.


-v, --version

Print node's version.

-h, --help

Print node command line options. The output of this option is less detailed than this document.

-e, --eval "script"

Evaluate the following argument as JavaScript.

-p, --print "script"

Identical to -e but prints the result.

-c, --check

Syntax check the script without executing.

-i, --interactive

Open the REPL even if stdin does not appear to be a terminal.

-r, --require module

Preload the specified module at startup. Follows `require()`'s module resolution rules. module may be either a path to a file, or a node module name.


Silence deprecation warnings.


Print stack traces for deprecations.


Throw errors for deprecations.


Silence all process warnings (including deprecations).


Print stack traces for process warnings (including deprecations).


Print a stack trace whenever synchronous I/O is detected after the first turn of the event loop.


Automatically zero-fills all newly allocated Buffer and SlowBuffer instances.


Instructs the module loader to preserve symbolic links when resolving and caching modules.


Track heap object allocations for heap snapshots.


Process v8 profiler output generated using the v8 option --prof


Print v8 command line options.

Note: v8 options allow words to be separated by both dashes (-) or underscores (_).

For example, --stack-trace-limit is equivalent to --stack_trace_limit


Set v8's thread pool size which will be used to allocate background jobs. If set to 0 then v8 will choose an appropriate size of the thread pool based on the number of online processors. If the value provided is larger than v8's max then the largest value will be chosen.


Specify an alternative default TLS cipher list. (Requires Node.js to be built with crypto support. (Default))


Enable FIPS-compliant crypto at startup. (Requires Node.js to be built with ./configure --openssl-fips)


Force FIPS-compliant crypto on startup. (Cannot be disabled from script code.) (Same requirements as --enable-fips)


Load an OpenSSL configuration file on startup. Among other uses, this can be used to enable FIPS-compliant crypto if Node.js is built with ./configure --openssl-fips.


Specify ICU data load path. (overrides NODE_ICU_DATA)

Environment Variables


´,´-separated list of core modules that should print debug information.


´:´-separated list of directories prefixed to the module search path.


When set to 1 colors will not be used in the REPL.


Data path for ICU (Intl object) data. Will extend linked-in data when compiled with small-icu support.


Path to the file used to store the persistent REPL history. The default path is ~/.node_repl_history, which is overridden by this variable. Setting the value to an empty string ("" or " ") disables persistent REPL history.


When set to 1, writes to stdout and stderr will be non-blocking and asynchronous when outputting to a TTY on platforms which support async stdio. Setting this will void any guarantee that stdio will not be interleaved or dropped at program exit. Avoid use.


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