argparse is a Node.js command-line arguments parser that provides help text, parsing, and validation, with support for sub-commands. It is a JavaScript port of Python’s argparse module, useful when you want to define CLI interfaces and handle options and positional arguments in your Node applications.
Project status
- Actively maintained recently, with a fresh upstream push on 2026-07-14 and a new published update (v3.0.0) the same day, indicating the project is back in active development rather than idle.
- Apparent update cadence is hard to infer from sparse history, but there is at least evidence of near-immediate follow-through around 3.0.0 (published within minutes of the upstream push), while the prior known update was in 2020.
AI summary generated
Recent updates
3.0.0
v3.0.0 is a major release of the Node.js argparse port, adding user-facing help coloring, error suggestions, deprecation warnings, and built-in TypeScript declarations. The codebase is reorganized (notably moving the main implementation under lib/) and the underlying Python argparse behavior was updated to match a newer Python version (3.14.6). Release notes in the provided source are empty, so consumers need to rely on the actual diff and migration documentation to understand changes.
BreakingFeatures2.0.1
Release 2.0.1 is a small patch version with a change focused on how the library reads command line arguments from `process.argv`. The code change adjusts argv slicing behavior to better support execution via interpreters like `coffee` and `ts-node`. No release notes were provided in the supplied release notes content.
2.0.0
Release 2.0.0 contains no publisher-provided release notes. The code diff for 1.0.10 to 2.0.0 shows a very large change set (73 files, 10,626 lines added, 8,039 lines deleted), indicating a major refactor or rewrite with likely breaking API impact.
Breaking1.0.10
Release 1.0.10 was published on 2018-02-15, but no release notes were provided by the publisher. There is no actionable information available here to determine new features, bug fixes, breaking changes, security, performance, or migration steps.
1.0.9
Release 1.0.9 appears to be a maintenance rerlease focused on dependency cleanup and minor documentation tooling updates. The provided publisher release notes are missing, so the actual behavioral impact must be inferred from the code and manifest changes.
1.0.8
Version 1.0.8 has no publisher-provided release notes. The diff shows mostly formatting/lint-related code changes, plus tooling and dependency updates intended to fix Node 6.5+ test behavior and add coverage tooling.
Features1.0.7
Version 1.0.7 introduces support for calling addArgument with a string (either a positional name like 'foo' or an option flag like '--foo' or '-f'), rather than requiring an array. The code changes are accompanied by updates to README, examples, and new tests demonstrating the new accepted input forms.
Features1.0.6
Release 1.0.6 has no publisher-provided release notes. The only documented change I can infer from the repo changelog is a maintenance update, “moved to eslint & updated CS,” but the actual diff contains a mix of style refactors and a few small behavioral/code-structure changes.
1.0.5
Release 1.0.5 is primarily an internal refactor that removes the lodash dependency and replaces lodash usage with a new internal helper module (lib/utils.js). The codebase also includes small behavioral changes around type checks, equality/union logic, default detection, and error message formatting.
1.0.4
Release 1.0.4 contains a small set of internal maintenance changes. There were no release notes provided by the publisher, and the diff indicates compatibility updates primarily around migrating to newer lodash APIs and adjusting strict mode usage.
1.0.3
Release 1.0.3 was published, but no release notes were provided by the publisher, so the specific changes in this version are unknown from the supplied information. There is no actionable developer-facing detail here regarding new functionality, fixes, or compatibility impacts.