Undefined Packages

to check null or empty

A Typescript assertion that only throws on null and undefined

Utilities that pair well with the lovely nullish coalescing (??) operator

Safe Window Getters

Сервис определения пустых значений для JavaScript

Safe Window Getters

Replicates Swift's Optional, hold a value or undefined, written in TypeScript.

Common javascript functions

👉 https://hyper.fun/c/carbon-icon-undefined/1.3.0

Optional module for JavaScript that provides interfaces to interact with potentially null/undefined values.

Simple stub factories reminiscent of undefined in Haskell

Classes for implementing different types of errors in the application.

Create response object instead of error throwing.

Used to check if some of the arguments are null or undefined.

coffeelint plugin that handles variables and their scope

Type safe variable checks

A small safe accessor that uses reduce to prevent 'Cannot read property of undefined' errors

Some standard guards and exceptions

A simple library to determine whether the object is null-like or not.

✅ Type validation for ES6+ and Typescript projects