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Simple Arguments processing for Node.js


Simple Command Line Arguments process, for Node.js.

Via npm on Node:

npm install simpleargs

Reference in your program:

var simpleargs = require('simpleargs');
var argv = simpleargs(process.argv.slice(2));

Invoking the above example

node example.js -p 3000 -host localhost
{ p: 3000, host: 'localhost' }

Any additional argument without associated option goes to the _ array property:

node example.js -p 3000 -host localhost hello world
{ p: 3000, host: 'localhost', _: ['hello', 'world'] }

You can define options with short name, name, default value and description

simpleargs.define('p','port',3000,'Port number')
    .define('h','host','localhost', 'Host name/address')
// if you call the program 
// node hello.js Hello world -p 4000 --host 'mydomain'         
var options = simpleargs(process.argv.slice(2));
// then options is { _: ['Hello', 'world'], port: 4000, host: 'mydomain' } 
git clone git://
cd SimpleArgs
npm install
npm test


  • Invalid parameters
  • Show usage
  • 0.0.1: Published
  • 0.0.2: Published. Inspired by minimist.
  • 0.0.3: Published. Flag support.

Feel free to file issues and submit pull requests � contributions are welcome.

If you submit a pull request, please be sure to add or update corresponding test cases, and ensure that npm test continues to pass.

(Thanks to JSON5 by aseemk. This file is based on that project