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    DefinitelyTyped icon, indicating that this package has TypeScript declarations provided by the separate @types/argparse package

    2.0.1 • Public • Published


    Build Status NPM version

    CLI arguments parser for node.js, with sub-commands support. Port of python's argparse (version 3.9.0).

    Difference with original.

    • JS has no keyword arguments support.
      • Pass options instead: new ArgumentParser({ description: 'example', add_help: true }).
    • JS has no python's types int, float, ...
      • Use string-typed names: .add_argument('-b', { type: 'int', help: 'help' }).
    • %r format specifier uses require('util').inspect().

    More details in doc.


    test.js file:

    #!/usr/bin/env node
    'use strict';
    const { ArgumentParser } = require('argparse');
    const { version } = require('./package.json');
    const parser = new ArgumentParser({
      description: 'Argparse example'
    parser.add_argument('-v', '--version', { action: 'version', version });
    parser.add_argument('-f', '--foo', { help: 'foo bar' });
    parser.add_argument('-b', '--bar', { help: 'bar foo' });
    parser.add_argument('--baz', { help: 'baz bar' });

    Display help:

    $ ./test.js -h
    usage: test.js [-h] [-v] [-f FOO] [-b BAR] [--baz BAZ]
    Argparse example
    optional arguments:
      -h, --help         show this help message and exit
      -v, --version      show program's version number and exit
      -f FOO, --foo FOO  foo bar
      -b BAR, --bar BAR  bar foo
      --baz BAZ          baz bar

    Parse arguments:

    $ ./test.js -f=3 --bar=4 --baz 5
    { foo: '3', bar: '4', baz: '5' }

    API docs

    Since this is a port with minimal divergence, there's no separate documentation. Use original one instead, with notes about difference.

    1. Original doc.
    2. Original tutorial.
    3. Difference with python.

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    npm i argparse

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