Checking Packages

A utility for creating webpack configs with common settings

Type checking for JSON values

Tweaked spell checker for CodeMirror

Runtime type checking for Flow

One lightly library contains a series of methods for converting one string or text to different kind of naming style, such as camelCase, PascalCase, hyphen-case, CONSTANT_CASE, etc.

Regular expression matching for email addresses. Maintained, configurable, more accurate, and browser-friendly alternative to email-regex. Works in Node v14+ and browsers. Made for Spam Scanner and Forward Email.

allows easy type enforcement for all JS types objects and classes. it is also extensible and provides simple to use type checks for your own custom classes and types

check if something is a POJO (plain old javascript object)

Signet type library

Javascript checking library

Simple options manager for JavaScript libraries. Handles type checking, default values assignation and throws generated usage on errors.

Angular form validation on steroids

Typescript transformer allowing to test if the structure of an object matches an interface/type

Utility for resolving and making values types safe

checktypes-js is a package to help you check the types of a item variable using simple type or scheme for an object

prop-types for Redux Resource

JavaScript library for check types

type-checking utility library for testing type match/mismatch, testing for common type categories, getting types of tested instances, and a few extra

typyts is a library to safely access nested object.

GraphQL 'constraint' directive written in functional programming style