JSPM

The fast and reliable JS type-checking toolbox!

A fixed version of the native javascript typeof function.

Useful simple functions.

Type check in TypeScript

Simple type checker in JavaScript.

A comprehensive collection of basic utility functions and component for React ( React >= 18)

This library is to check for null and undefined values in JSON objects

This package is for confirming data that will take arguments to verify its value and type.

Curried TypeScript type guards for primitive types and classes

Curried TypeScript type guards for primitive types and classes

a practical custom toolkit

This library provides core functionalities for determining the type of a given object, supporting various JavaScript data types.

Check if the given value is of a specific type.

A node.js module to get, compare and check types

Curried TypeScript type guards for primitive types and classes

A base class implementing basic value validators. E.g: isDefined, isNumber, etc... More validators to be added soon (isEmpty, isNull, isGreaterThan, isLessThan, isBoolean, isArray, etc...)

has-empty-value is a package used to check the value is empty.

A utility function to fix and extend the built-in ''typeof'' operator of JavaScript.

JSON isNull method

A lightweight utility library for common JavaScript checks, including isEmpty, isNull, isNumber, isEmptyString, isArray, and isNaN. Useful for validation and data handling.

Check if the parameter is null

JavaScript library to check data types

A small set of functions to check value against a specific type

Javascript data type check true or false.