checkify-utils

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

Installation

npm install checkify-utils

or

yarn add checkify-utils

Usage

import {
  isEmpty,
  isNull,
  isNumber,
  isEmptyString,
  isArray,
  isNaN,
} from "checkify-utils";

console.log(isEmpty([])); // true
console.log(isEmpty({})); // true
console.log(isNull(null)); // true
console.log(isNull(undefined)); // true
console.log(isNumber(42)); // true
console.log(isNumber(0)); // true
console.log(isEmptyString("")); // true
console.log(isArray([1, 2, 3])); // true
console.log(isNaN(NaN)); // true

API Reference

isEmpty(value: any): boolean

Checks if the given value is empty ([], {}).

isNull(value: any): boolean

Checks if the given value is null or undefined.

isNumber(value: any): boolean

Checks if the given value is a number (including 0).

isEmptyString(value: any): boolean

Checks if the given value is an empty string ("").

isArray(value: any): boolean

Checks if the given value is an array.

isNaN(value: any): boolean

Checks if the given value is NaN.

License

MIT