the complete solution for node.js command-line programs

option parsing and help generation

Validate plugin/preset options

The option type, also known as the maybe type, for JavaScript

Command line argument parser

Write files in an atomic fashion w/configurable ownership

A mature, feature-complete library to parse command-line options.

After Effects plugin for exporting animations to SVG + JavaScript or canvas + JavaScript

Option parsing for Node, supporting types, shorthands, etc. Used by npm.

Polyfill of future proposal for `util.parseArgs()`

A toolkit of Nullable/Option/Result type implementation in ECMAScript. Their APIs are inspired by Rust's `Option<T>` and `Result<T, E>`.

Let users toggle colors

Managing and serializing Rust-like Option types in JavaScript

A TypeScript implementation of Rust's Result and Option objects.

Really Fast Deep Clone

Streaming CSV parser that aims for maximum speed as well as compatibility with the csv-spectrum test suite

Convert milliseconds to a human readable string: `1337000000` → `15d 11h 23m 20s`

Light-weight option parsing with an argv hash. No optstrings attached.

Type-safe CLI library / framework with no runtime dependencies

A per-spec XML serializer implementation