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.\" .\" This manpage is written in mdoc(7). .\" .\" * Language reference: .\" https://man.openbsd.org/mdoc.7 .\" .\" * Atom editor support: .\" https://atom.io/packages/language-roff .\" .\" * Linting changes: .\" mandoc -Wall -Tlint /path/to/this.file # BSD .\" groff -w all -z /path/to/this.file # GNU/Linux, macOS .\" .\" .\" Before making changes, please note the following: .\" .\" * In Roff, each new sentence should begin on a new line. This gives .\" the Roff formatter better control over text-spacing, line-wrapping, .\" and paragraph justification. .\" .\" * Do not leave blank lines in the markup. If whitespace is desired .\" for readability, put a dot in the first column to indicate a null/empty .\" command. Comments and horizontal whitespace may optionally follow: each .\" of these lines are an example of a null command immediately followed by .\" a comment. .\" .\"====================================================================== . .Dd 2018 .Dt NODE 1 . .Sh NAME .Nm node .Nd server-side JavaScript runtime . .\"====================================================================== .Sh SYNOPSIS .Nm node .Op Ar options .Op Ar v8-options .Op Fl e Ar string | Ar script.js | Fl .Op Fl - .Op Ar arguments ... . .Nm node .Cm inspect .Op Fl e Ar string | Ar script.js | Fl | Ar <host>:<port> .Ar ... . .Nm node .Op Fl -v8-options . .\"====================================================================== .Sh DESCRIPTION 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. .Pp Execute .Nm without arguments to start a REPL. . .Sh OPTIONS .Bl -tag -width 6n .It Sy - Alias for stdin, analogous to the use of - in other command-line utilities. The executed script is read from stdin, and remaining arguments are passed to the script. . .It Fl - Indicate the end of command-line options. Pass the rest of the arguments to the script. .Pp If no script filename or eval/print script is supplied prior to this, then the next argument will be used as a script filename. . .It Fl -abort-on-uncaught-exception Aborting instead of exiting causes a core file to be generated for analysis. . .It Fl -completion-bash Print source-able bash completion script for Node.js. . .It Fl -enable-fips Enable FIPS-compliant crypto at startup. Requires Node.js to be built with .Sy ./configure --openssl-fips . . .It Fl -experimental-modules Enable experimental ES module support and caching modules. . .It Fl -experimental-repl-await Enable experimental top-level .Sy await keyword support in REPL. . .It Fl -experimental-vm-modules Enable experimental ES module support in VM module. . .It Fl -experimental-worker Enable experimental worker threads using worker_threads module. . .It Fl -force-fips Force FIPS-compliant crypto on startup (Cannot be disabled from script code). Same requirements as .Fl -enable-fips . . .It Fl -http-parser Ns = Ns Ar library Chooses an HTTP parser library. Available values are .Sy llhttp or .Sy legacy . . .It Fl -icu-data-dir Ns = Ns Ar file Specify ICU data load path. Overrides .Ev NODE_ICU_DATA . . .It Fl -inspect-brk Ns = Ns Ar [host:]port Activate inspector on .Ar host:port and break at start of user script. . .It Fl -inspect-port Ns = Ns Ar [host:]port Set the .Ar host:port to be used when the inspector is activated. . .It Fl -inspect Ns = Ns Ar [host:]port Activate inspector on .Ar host:port . Default is .Sy 127.0.0.1:9229 . .Pp V8 Inspector integration allows attaching Chrome DevTools and IDEs to Node.js instances for debugging and profiling. It uses the Chrome DevTools Protocol. . .It Fl -loader Ns = Ns Ar file Specify the .Ar file as a custom loader, to load .Fl -experimental-modules . . .It Fl -insecure-http-parser Use an insecure HTTP parser that accepts invalid HTTP headers. This may allow interoperability with non-conformant HTTP implementations. It may also allow request smuggling and other HTTP attacks that rely on invalid headers being accepted. Avoid using this option. . .It Fl -max-http-header-size Ns = Ns Ar size Specify the maximum size of HTTP headers in bytes. Defaults to 8KB. . .It Fl -napi-modules This option is a no-op. It is kept for compatibility. . .It Fl -no-deprecation Silence deprecation warnings. . .It Fl -no-force-async-hooks-checks Disable runtime checks for `async_hooks`. These will still be enabled dynamically when `async_hooks` is enabled. . .It Fl -no-warnings Silence all process warnings (including deprecations). . .It Fl -openssl-config Ns = Ns Ar file 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 .Sy ./configure --openssl-fips . . .It Fl -pending-deprecation Emit pending deprecation warnings. . .It Fl -preserve-symlinks Instructs the module loader to preserve symbolic links when resolving and caching modules other than the main module. . .It Fl -preserve-symlinks-main Instructs the module loader to preserve symbolic links when resolving and caching the main module. . .It Fl -prof Generate V8 profiler output. . .It Fl -prof-process Process V8 profiler output generated using the V8 option .Fl -prof . . .It Fl -redirect-warnings Ns = Ns Ar file Write process warnings to the given .Ar file instead of printing to stderr. . .It Fl -throw-deprecation Throw errors for deprecations. . .It Fl -title Ns = Ns Ar title Specify process.title on startup. . .It Fl -tls-cipher-list Ns = Ns Ar list Specify an alternative default TLS cipher list. Requires Node.js to be built with crypto support. (Default) . .It Fl -tls-max-v1.2 Does nothing, the default maxVersion is always 'TLSv1.2'. Exists for compatibility with Node.js 11.x and higher. . .It Fl -tls-min-v1.0 Set default minVersion to 'TLSv1'. Use for compatibility with old TLS clients or servers. . .It Fl -tls-min-v1.1 Set default minVersion to 'TLSv1.1'. Use for compatibility with old TLS clients or servers. . .It Fl -tls-min-v1.2 Set default minVersion to 'TLSv1.2'. Use to disable support for earlier TLS versions, which are less secure. . .It Fl -trace-deprecation Print stack traces for deprecations. . .It Fl -trace-event-categories Ar categories A comma-separated list of categories that should be traced when trace event tracing is enabled using .Fl -trace-events-enabled . . .It Fl -trace-event-file-pattern Ar pattern Template string specifying the filepath for the trace event data, it supports .Sy ${rotation} and .Sy ${pid} . . .It Fl -trace-events-enabled Enable the collection of trace event tracing information. . .It Fl -trace-sync-io Print a stack trace whenever synchronous I/O is detected after the first turn of the event loop. . .It Fl -trace-warnings Print stack traces for process warnings (including deprecations). . .It Fl -track-heap-objects Track heap object allocations for heap snapshots. . .It Fl --unhandled-rejections=mode Define the behavior for unhandled rejections. Can be one of `strict` (raise an error), `warn` (enforce warnings) or `none` (silence warnings). . .It Fl -use-bundled-ca , Fl -use-openssl-ca Use bundled Mozilla CA store as supplied by current Node.js version or use OpenSSL's default CA store. The default store is selectable at build-time. .Pp The bundled CA store, as supplied by Node.js, is a snapshot of Mozilla CA store that is fixed at release time. It is identical on all supported platforms. .Pp Using OpenSSL store allows for external modifications of the store. For most Linux and BSD distributions, this store is maintained by the distribution maintainers and system administrators. OpenSSL CA store location is dependent on configuration of the OpenSSL library but this can be altered at runtime using environment variables. .Pp See .Ev SSL_CERT_DIR and .Ev SSL_CERT_FILE . . .It Fl -v8-options Print V8 command-line options. . .It Fl -v8-pool-size Ns = Ns Ar num 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 maximum, then the largest value will be chosen. . .It Fl -zero-fill-buffers Automatically zero-fills all newly allocated Buffer and SlowBuffer instances. . .It Fl c , Fl -check Check the script's syntax without executing it. Exits with an error code if script is invalid. . .It Fl e , Fl -eval Ar string Evaluate .Ar string as JavaScript. . .It Fl h , Fl -help Print command-line options. The output of this option is less detailed than this document. . .It Fl i , Fl -interactive Open the REPL even if stdin does not appear to be a terminal. . .It Fl p , Fl -print Ar string Identical to .Fl e , but prints the result. . .It Fl r , Fl -require Ar module Preload the specified .Ar module at startup. Follows `require()`'s module resolution rules. .Ar module may be either a path to a file, or a Node.js module name. . .It Fl v , Fl -version Print node's version. .El . .\" ===================================================================== .Sh ENVIRONMENT .Bl -tag -width 6n .It Ev NODE_DEBUG Ar modules... Comma-separated list of core modules that should print debug information. . .It Ev NODE_DEBUG_NATIVE Ar modules... Comma-separated list of C++ core modules that should print debug information. . .It Ev NODE_DISABLE_COLORS When set to .Ar 1 , colors will not be used in the REPL. . .It Ev NODE_EXTRA_CA_CERTS Ar file When set, the well-known .Dq root CAs (like VeriSign) will be extended with the extra certificates in .Ar file . The file should consist of one or more trusted certificates in PEM format. .Pp If .Ar file is missing or misformatted, a message will be emitted once using .Sy process.emitWarning() , but any errors are otherwise ignored. .Pp This environment variable is ignored when `node` runs as setuid root or has Linux file capabilities set. . .It Ev NODE_ICU_DATA Ar file Data path for ICU (Intl object) data. Will extend linked-in data when compiled with small-icu support. . .It Ev NODE_NO_WARNINGS When set to .Ar 1 , process warnings are silenced. . .It Ev NODE_OPTIONS Ar options... A space-separated list of command-line .Ar options , which are interpreted as if they had been specified on the command-line before the actual command (so they can be overridden). Node.js will exit with an error if an option that is not allowed in the environment is used, such as .Fl -print or a script file. . .It Ev NODE_PATH Ar directories... A colon-separated list of .Ar directories prefixed to the module search path. . .It Ev NODE_PENDING_DEPRECATION When set to .Ar 1 , emit pending deprecation warnings. . .It Ev NODE_PRESERVE_SYMLINKS When set to .Ar 1 , the module loader preserves symbolic links when resolving and caching modules. . .It Ev NODE_REDIRECT_WARNINGS Ar file Write process warnings to the given .Ar file instead of printing to stderr. Equivalent to passing .Fl -redirect-warnings Ar file on command-line. .It Ev NODE_REPL_HISTORY Ar file Path to the .Ar file used to store persistent REPL history. The default path is .Sy ~/.node_repl_history , which is overridden by this variable. Setting the value to an empty string ("" or " ") will disable persistent REPL history. . .It Ev NODE_TLS_REJECT_UNAUTHORIZED When set to .Ar 0 , TLS certificate validation is disabled. . .It Ev NODE_V8_COVERAGE Ar dir When set, Node.js writes JavaScript code coverage information to .Ar dir . . .It Ev OPENSSL_CONF Ar file 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 .Sy ./configure --openssl-fips . .Pp If the .Fl -openssl-config command-line option is used, this environment variable is ignored. . .It Ev SSL_CERT_DIR Ar dir If .Fl -use-openssl-ca is enabled, this overrides and sets OpenSSL's directory containing trusted certificates. . .It Ev SSL_CERT_FILE Ar file If .Fl -use-openssl-ca is enabled, this overrides and sets OpenSSL's file containing trusted certificates. . .It Ev UV_THREADPOOL_SIZE Ar size Sets the number of threads used in libuv's threadpool to .Ar size . . .El .\"===================================================================== .Sh BUGS Bugs are tracked in GitHub Issues: .Sy https://github.com/nodejs/node/issues . .\"====================================================================== .Sh COPYRIGHT Copyright Node.js contributors. Node.js is available under the MIT license. . .Pp Node.js also includes external libraries that are available under a variety of licenses. See .Sy https://github.com/nodejs/node/blob/master/LICENSE for the full license text. . .\"====================================================================== .Sh SEE ALSO Website: .Sy https://nodejs.org/ . .Pp Documentation: .Sy https://nodejs.org/api/ . .Pp GitHub repository & Issue Tracker: .Sy https://github.com/nodejs/node . .Pp IRC (general questions): .Sy "chat.freenode.net #node.js" (unofficial) . .Pp IRC (Node.js core development): .Sy "chat.freenode.net #node-dev" . .\"====================================================================== .Sh AUTHORS Written and maintained by 1000+ contributors: .Sy https://github.com/nodejs/node/blob/master/AUTHORS
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