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yargs/yargs-parser

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Last release:

yargs-parser is the option parser used by yargs. It parses command line arguments (as a string or string array) into an object of key/value pairs, supporting common parsing options like aliases, booleans, arrays, type coercion, defaults, env var parsing, and configuration file loading.

Project status

  • Active maintenance: Evidence suggests the upstream repo had a push on 2026-05-15, but the last published updates in the provided history are from 2025-05-26, so from a consumer perspective it looks quiet/in maintenance-like mode rather than actively releasing changes day to day.
  • Update cadence: The updates shown are very infrequent (next to no activity documented in the last year+, at least for the published v21 to v22 jump and then no newer version listed after May 2025).

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Recent updates

  • yargs-parser-v22.0.0-deno

    This release has no publisher-provided release notes (release notes: none provided). The code diff consists entirely of added build artifacts (ESM entrypoint, parser implementation, helper utilities, and TypeScript declaration files) for the yargs-parser-v22.0.0-deno package.

    Features

  • yargs-parser-v22.0.0

    yargs-parser v22.0.0 primarily shifts the package to be ESM-first. The release notes only call out the ESM-first breaking change, but the code diff shows additional compatibility changes around CommonJS entrypoints, supported Node versions, and the build/test toolchain.

    Breaking

  • yargs-parser-v21.1.1

    yargs-parser v21.1.1 is a small packaging and build-related update. The documented change is a TypeScript-related fix to ignore .cts artifacts during publishing.

  • yargs-parser-v21.1.0

    yargs-parser v21.1.0 adds support for importing the browser build and includes a few parsing-related bug fixes. The code changes mainly adjust Node version detection, refine how unknown options are treated when halt-at-non-option and unknown-options-as-args are enabled, and tighten handling of option tokens with 3 or more trailing hyphens.

    Features

  • yargs-parser-v21.0.1

    yargs-parser v21.0.1 is a small patch release focused on a Deno-specific bug fix. The release notes document returning the Deno environment object so envPrefix-based parsing works correctly.

  • yargs-parser-v21.0.0

    yargs-parser v21.0.0 primarily updates Node compatibility and fixes parsing behavior around JSON config imports in ESM and how quoted strings are handled. Release notes call out dropping support for Node 10, plus bug fixes for ESM JSON handling and preserving inner quotes during parsing.

    Breaking

  • yargs-parser-v20.2.9

    Release yargs-parser v20.2.9 is documented as a single bug fix related to the automated release pipeline. The provided code diff shows only version and changelog/version manifest updates, with no actual parser/runtime code changes present in the diff.

  • yargs-parser-v20.2.8

    yargs-parser v20.2.8 release notes only list a handful of bug fixes (Deno release, Turkish locale casing, a performance fix for unknown-options-as-args, and improved number detection in string-utils). The actual diff shows a much larger refactor to a TypeScript, ESM/CJS-compatible build with new packaging and internal implementations. Several potentially breaking behavior and compatibility changes are not mentioned in the release notes.

  • yargs-parser-v15.0.3

    yargs-parser v15.0.3 includes a single build/workflow related bug fix. The published package version and changelog were updated accordingly, but no runtime parsing logic or public API code changes are present in the diff.

  • yargs-parser-v15.0.2

    This release primarily addresses performance issues in yargs-parser when parsing unknown-options-as-args. In the actual code changes, it also introduces additional input sanitization intended to prevent prototype pollution during dot-notation parsing, which is not mentioned in the release notes.

    BreakingSecurity

  • v20.2.7

    Release v20.2.7 release notes contain only a single Deno-related bug fix. The actual code diff for this release shows a much larger, largely undocumented refactor and packaging change, including a migration from the legacy CommonJS implementation to a TypeScript-based ESM/CJS build with new entrypoints for Node, Deno, and browsers.