Optional Packages

JavaScript Optional type for functional programming with Flow

No runtime errors if non-function is 'called'.

utility functions with Nullable

JavaScript utility bundle

Determine if object or array path is valid.

A tiny and mighty utility for optional chaining in pure JavaScript

Null coalescing library for JS

Cleanly try requiring optional dependencies

Adds stable future js operators and a little scala.js for terse functional programming

Helper for jQuery style arguments declaration

CHKUI-SITE

A Try encapsulates the result of an operation that may have failed.

Add java-like optional functionality to your application

Optional javascript library

Add a rejection fallback handler to a Promise if no one handles it

Disable a package throughout your build process by pointing it to an empty module. This was designed for use with the `fsevents` package, which breaks builds for Webpack and Rollup alike.

Validate config files following user-defined rules.

A rigorous but lightweight implementation of the Maybe monad.

like java 8 Optional

Monad with do notation in Javascript, using ES6 generators.