js-utils-checkers

About js-utils-checkers

js-utils-checkers is a lightweight JavaScript utility package that provides commonly needed type and value checking functions.

Features

• Simple and reusable utility functions
• Helpful for both frontend and backend JavaScript/Node.js projects
• Zero dependencies

📦 Installation

npm install js-utils-checkers
# or
yarn add js-utils-checkers

🚀 Usage

import {
  isEmpty,
  isNullOrUndefined,
  isEmptyArray,
  isObject,
  isToday
} from 'js-utils-checkers';

console.log(isEmpty(''));         // true
console.log(isObject({}));        // true
console.log(isToday(new Date())); // true

🧰 Available Functions

🔹 isEmpty(value)

Returns true if the value is:

• null
• undefined
• an empty string ''
• an empty array []

Example:

isEmpty(null);       // true
isEmpty(undefined);  // true
isEmpty('');         // true
isEmpty([]);         // true

🔹 isNullOrUndefined(value)

Returns true if the value is either null or undefined.

Example:

isNullOrUndefined(null);        // true
isNullOrUndefined(undefined);   // true

🔹 isEmptyArray(arr)

Returns true if the value is an array and is empty.

Example:

isEmptyArray([]);              // true
isEmptyArray([1]);             // false

🔹 isObject(obj)

Returns true if the value is a plain object (i.e., not an array, not null).

Example:

isObject({});                   // true
isObject(null);                 // false

🔹 isToday(date)

Checks if a given Date object matches today’s date.

Example:

isToday(new Date());           // true

📁 Project Structure

js-utils-checkers/
├── src/
│   └── index.js         
├── test.js              
├── package.json         
├── README.md            
├── .gitignore
└── .npmignore           

🧪 Local Testing

Create a test file to verify functionality:

import { isEmpty, isObject, isToday } from './src/index.js';

console.log(isEmpty([])); 
console.log(isObject({}));
console.log(isToday(new Date()));

Run it:

node test.js

🤝 Contributing

We welcome contributions!

1. Fork the repo
2. Create a feature branch
3. Commit your changes
4. Open a pull request

📜 License

This project is licensed under the MIT License

🙌 Support

If you find this useful, please star the repo or share it with others!