JSPM

ES2015-compliant shim for Number.isNaN - the global isNaN returns false positives.

MDN polyfills

ES6-compliant shim for Number.isNaN - the global isNaN returns false positives.

ES2015-compliant shim for Number.isNaN - the global isNaN returns false positives.

A very simple "typeof" detection

MDN polyfills

Provides type detection and analysis for ANY Javascript object (including custom types) in any environment, even where native operators falter.

Simple type checker in JavaScript.

Collection of methods for check

A very simple "typeof" detection

locore is a Standard library. the library with basic JavaScript methods to improve development efficiency.

a collection of javascript prototype extensions that make your javascript coding very easy and hanndy.

Simple type checker in JavaScript.

CheeseNaN is a utility library for robust number validation in JavaScript and TypeScript, including precise NaN checks, mathematical utilities, and range validations.

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

Widely supported version of Number.isNaN. Checks whether a value is a number and that it's not NaN.

Widely supported version of Number.isFinite. Checks whether a value is a finite number.

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