Optional Packages

try to install an optional development dependency, YOLO if you can't.

Wraps a function whose last argument is preceded by optional arguments so that when fewer arguments are passed in, missing optional arguments are filled in as `undefined`.

TypeScript recursive conversion between optional (partial) and undefined properties.

A typesafe way to get nested properties when any parent property might be undefined, while we wait for the optional chaining operator to finally exist

Library for handling possibly undefined values

JavaScript awesome yet another assertion module

Maybe is a type that wraps optional values

An optional library enabling the usage of optionals written in TypeScript

Airbnb's ESLint config with optional TypeScript support

JS schema-based optional chaining

Well-typed functional Maybe monad

Assigns default values to an object along with validating for required and unknown property keys.

A utility for managing optional typed arguments.

Tiny module for setting a default value when a parameter is undefind or null

Syslog package that exposes modern-syslog when possible, otherwise provides a stub

Typed Option/Optional/Maybe for TypeScript and JavaScript, created to simplify code involving optional values (null, undefined, NaN).

A furry little helper for dealing with optional NPM dependencies

_declarative-js_ is modern JavaScript library, that helps to: - tackle array transformation with built in JavaScript array api (e.g. `array.filter(toBe.unique())`), - provide a type-level solution for representing optional values instead of null referen

Maybe monadic container implementation

Helps implementing functions that are synchronous or asynchronous depending of their parameters