node-redis guide (JavaScript)

Connect your Node.js/JavaScript application to a Redis database

node-redis is the Redis client for Node.js/JavaScript. The sections below explain how to install node-redis and connect your application to a Redis database.

Note:
node-redis is the recommended client library for Node.js/JavaScript, but we also support and document our older JavaScript client ioredis. See Migrate from ioredis if you are interested in converting an existing ioredis project to node-redis.

node-redis requires a running Redis server. See here for Redis Open Source installation instructions.

You can also access Redis with an object-mapping client interface. See RedisOM for Node.js for more information.

Install

To install node-redis, run:

npm install redis

Connect and test

Connect to localhost on port 6379.

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Foundational: Create a client connection to a Redis server using node-redis
Ctrl+Enter to run 
import { createClient } from 'redis';

const client = createClient();

client.on('error', err => console.log('Redis Client Error', err));

await client.connect();
Node.js Quick-Start

Store and retrieve a simple string.

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Foundational: Set and retrieve string values using SET and GET commands
Ctrl+Enter to run 
await client.set('key', 'value');
const value = await client.get('key');
console.log(value);
Node.js Quick-Start

Store and retrieve a map.

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Foundational: Store and retrieve hash data structures using HSET and HGET commands
Ctrl+Enter to run 
await client.hSet('user-session:123', {
    name: 'John',
    surname: 'Smith',
    company: 'Redis',
    age: 29
})

let userSession = await client.hGetAll('user-session:123');
console.log(JSON.stringify(userSession, null, 2));
Node.js Quick-Start

To connect to a different host or port, use a connection string in the format redis[s]://[[username][:password]@][host][:port][/db-number]:

createClient({
  url: 'redis://alice:[email protected]:6380'
});

To check if the client is connected and ready to send commands, use client.isReady, which returns a Boolean. client.isOpen is also available. This returns true when the client's underlying socket is open, and false when it isn't (for example, when the client is still connecting or reconnecting after a network error).

When you have finished using a connection, close it with client.quit().

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Foundational: Close a Redis client connection using the quit() method
Ctrl+Enter to run 
await client.quit();
Node.js Quick-Start

More information

The node-redis website has more examples. The Github repository also has useful information, including a guide to the connection configuration options you can use.

See also the other pages in this section for more information and examples:

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