Undefined Packages

Get a value from object by path

If value is null or undefined, it sets a default value instead.

JavaScript Isser library.

Transform an Object that was transformed to return only the original properties recursively picked if they are not undefined.

Boilerplate-free Enzyme testing

Nullish checker

A window usage on gatsby app

Check if a variable in a nested object is defined and optionally also check its type. Useful for verifying API responses.

Defines a type that can be mixed with null and undefined.

Return the first argument that is `!= null`

The package provides methods to check whether a JSON object or a JSON array is empty or not. - The package considers an **object** empty when it is `null`, `undefined` or has no keys. - The package considers an **array** empty when it is `null`, `undefine

Monadic library to help with Typescripts --strictNullChecks

Validates if a value is a JavaScript primitive.

Nullable type and helper functions for typescript

A safe way to access values in deeply nested objects.

Return dotted keys containing undefined values within an object including deeply nested objects

Absent checks existence of variable, properties or items in a collection.

checks if foo is not defined, i.e. undefined, null, an empty string, array, object or NaN

Validation utilities.

A package for judging a string is null or empty or undefined