10 Powerful Node.js Libraries Every Developer Should Know About
Tags: javascript, node, webdev, beginners
Published: 2023-04-27 09:00:00

## Intro

While many developers are familiar with popular Node.js libraries like Express, Socket.IO, and Mongoose, there are several hidden gems in the Node.js ecosystem that are lesser-known but equally powerful.

In this article, we will unlock these hidden gems and explore 10 powerful Node.js libraries that most developers may not be aware of. From handling real-time streaming to building desktop applications, these libraries offer unique capabilities that can level up your Node.js development skills. So, let's dive in and uncover these hidden gems!

Sure! Here are the descriptions of the Node.js libraries along with code examples:

### 1. [pino](https://github.com/pinojs/pino)

A fast and lightweight logging library for Node.js that provides low overhead and high throughput, making it ideal for production logging.

```javascript
const pino = require('pino');

// Create a logger instance
const logger = pino();

// Log an info message
logger.info('This is an info message');

// Log an error message with additional data
const error = new Error('An error occurred');
logger.error(error, 'This is an error message');
```

### 2. [sharp](https://github.com/lovell/sharp)

A powerful image processing library that allows for image resizing, cropping, and manipulation with high performance and minimal dependencies.

```javascript
const sharp = require('sharp');

// Read an image file
const image = sharp('input.jpg');

// Resize the image to a specific width and height
image.resize(300, 200)
  .toFile('output.jpg', (err, info) => {
    if (err) {
      console.error(err);
    } else {
      console.log('Image resized successfully:', info);
    }
  });
```

### 3. [fastify](https://github.com/fastify/fastify)

A fast and minimalist web framework for Node.js that is focused on performance, security, and extensibility, making it an excellent choice for building scalable APIs.

```javascript
const fastify = require('fastify');

// Create a fastify server instance
const server = fastify();

// Define a route
server.get('/', async (request, reply) => {
  return { hello: 'world' };
});

// Start the server
server.listen(3000, (err) => {
  if (err) {
    console.error(err);
  } else {
    console.log('Server is running on port 3000');
  }
});
```

### 4. [node-cache](https://github.com/node-cache/node-cache)

A simple and efficient in-memory caching library that can store key-value pairs, making it useful for caching frequently accessed data to improve performance.

```javascript
const NodeCache = require('node-cache');

// Create a NodeCache instance
const cache = new NodeCache();

// Set a key-value pair in the cache with a specific TTL (time-to-live)
cache.set('key', 'value', 3600);

// Get the value associated with a key from the cache
const value = cache.get('key');

console.log(value); // Output: 'value'
```

### 5. [ioredis](https://github.com/luin/ioredis)

A high-performance Redis client for Node.js that supports both Redis sentinel and cluster, and provides advanced features like connection pooling, pipelining, and Lua script execution.

```javascript
const Redis = require('ioredis');

// Create a Redis client instance
const redis = new Redis();

// Set a value in Redis
redis.set('key', 'value')
  .then(() => {
    console.log('Value set successfully');
  })
  .catch((err) => {
    console.error(err);
  });

// Get a value from Redis
redis.get('key')
  .then((value) => {
    console.log(value); // Output: 'value'
  })
  .catch((err) => {
    console.error(err);
  });
```

### 6. [agenda](https://github.com/agenda/agenda)

A lightweight job scheduling library that allows developers to define and schedule recurring or one-time tasks, making it useful for handling asynchronous processing and background jobs.

```javascript
const Agenda = require('agenda');

// Create an agenda instance
const agenda = new Agenda({ db: { address: 'mongodb://localhost/agenda' } });

// Define a job
agenda.define('send email', (job) => {
  console.log(`Sending email to ${job.attrs.data.email}...`);
});

// Schedule a job to run after 5 seconds
agenda.schedule('now +5
```

### 7.[fast-json-stringify](https://github.com/fastify/fast-json-stringify)

A blazing fast JSON stringification library that can convert JavaScript objects to JSON strings with high performance and low memory usage, making it ideal for handling large data sets.

```javascript
const fastJsonStringify = require('fast-json-stringify');

// Define a schema for the JSON object
const schema = {
  type: 'object',
  properties: {
    id: { type: 'integer' },
    name: { type: 'string' },
    age: { type: 'integer' },
    isActive: { type: 'boolean' }
  }
};

// Create a JSON stringification function
const stringify = fastJsonStringify(schema);

// Convert JavaScript object to JSON string
const obj = { id: 1, name: 'John', age: 30, isActive: true };
const jsonString = stringify(obj);

console.log(jsonString);
// Output: {"id":1,"name":"John","age":30,"isActive":true}
```

### 8.[ms](https://github.com/vercel/ms)

A simple and intuitive library for converting time durations to human-readable strings, making it helpful for formatting time-related values in a user-friendly way.

```javascript
const ms = require('ms');

// Convert time duration to human-readable string
const duration = 1500; // 1500 milliseconds
const readableDuration = ms(duration);

console.log(readableDuration);
// Output: 1.5s
```

### 9.[uuid](https://github.com/uuidjs/uuid)

A library for generating universally unique identifiers (UUIDs) that are suitable for use as unique identifiers in distributed systems or databases.

```javascript
const { v4: uuidv4, v5: uuidv5 } = require('uuid');

// Generate a version 4 (random) UUID
const randomUuid = uuidv4();

console.log(randomUuid);
// Output: a9058c61-417e-4f5e-ba5a-fa5af2c5cb5a

// Generate a version 5 (namespace-based) UUID
const namespace = '1b671a64-40d5-491e-99b0-da01ff1f3341';
const name = 'hello';
const namespaceUuid = uuidv5(name, namespace);

console.log(namespaceUuid);
// Output: 0c74e38b-6ee5-5d2b-b56c-4f9aa9abba75
```

### 10.[dayjs](https://github.com/iamkun/dayjs)

A modern and lightweight date and time manipulation library that provides a simple and chainable API for parsing, formatting, and manipulating dates and times.

```javascript
const dayjs = require('dayjs');

// Parse and format a date
const dateStr = '2023-04-25T10:30:00Z';
const formattedDate = dayjs(dateStr).format('MMMM D, YYYY h:mm A');

console.log(formattedDate);
// Output: April 25, 2023 10:30 AM

// Manipulate dates and times
const currentDate = dayjs();
const nextWeek = currentDate.add(1, 'week');
const isBefore = currentDate.isBefore(nextWeek);

console.log(isBefore);
// Output: true
```

**Note: Please make sure to install the required libraries using npm or yarn before running the above code examples.**

## Conclusion

Node.js is a dynamic platform with a vast ecosystem of libraries that can greatly enhance your development capabilities. While many developers are familiar with popular Node.js libraries, there are several lesser-known yet powerful libraries that can add new dimensions to your Node.js projects.

Related: [nvm (Node Version Manager), Guide & Cheat sheet](https://www.squash.io/nvm-node-version-manager-guide-cheat-sheet/)

From IoT applications to desktop applications, streaming applications to AI applications, game development to blockchain applications, these hidden gems offer unique capabilities that can unlock new possibilities for your projects.