level

What is level?

The 'level' npm package is a fast and simple key-value storage library for Node.js. It provides a persistent storage solution that is easy to use and integrates well with other Node.js modules. It is built on top of LevelDB, a fast key-value storage library developed by Google.

What are level's main functionalities?

Basic CRUD Operations

This feature allows you to perform basic Create, Read, Update, and Delete (CRUD) operations on the database. The code sample demonstrates how to put a key-value pair, retrieve a value by key, and delete a key-value pair.

const level = require('level');
const db = level('./mydb');

// Put a key-value pair
await db.put('name', 'Alice');

// Get a value by key
const value = await db.get('name');
console.log(value); // 'Alice'

// Delete a key-value pair
await db.del('name');

Batch Operations

Batch operations allow you to perform multiple operations in a single atomic action. The code sample demonstrates how to use the batch method to put and delete multiple key-value pairs in one go.

const level = require('level');
const db = level('./mydb');

// Perform batch operations
await db.batch()
  .put('name', 'Alice')
  .put('age', 30)
  .del('name')
  .write();

Streams

Streams provide a way to read and write data in a continuous flow. The code sample demonstrates how to create a read stream to iterate over all key-value pairs in the database.

const level = require('level');
const db = level('./mydb');

// Create a read stream
const stream = db.createReadStream();

stream.on('data', ({ key, value }) => {
  console.log(`${key} = ${value}`);
});

Other packages similar to level

nedb

NeDB is a lightweight, in-memory database that provides a MongoDB-like API. It is suitable for small projects and can be used as an embedded database. Unlike Level, NeDB stores data in memory by default, which can be less performant for large datasets.

sqlite3

SQLite3 is a self-contained, serverless, and zero-configuration SQL database engine. It is more feature-rich compared to Level, offering SQL query capabilities. However, it may be overkill for simple key-value storage needs.

pouchdb

PouchDB is an open-source JavaScript database inspired by CouchDB. It is designed to run in the browser and Node.js, providing a NoSQL database solution. PouchDB offers more advanced features like synchronization with CouchDB, which Level does not provide.

README

A package that bundles LevelUP and LevelDOWN.