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The official Node.js client for Elasticsearch.

Refer to the Installation section of the getting started documentation.

Refer to the Connecting section of the getting started documentation.

The Elasticsearch client is compatible with currently maintained JS versions.

Language clients are forward compatible; meaning that clients support communicating with greater or equal minor versions of Elasticsearch without breaking. It does not mean that the client automatically supports new features of newer Elasticsearch versions; it is only possible after a release of a new client version. For example, a 8.12 client version won't automatically support the new features of the 8.13 version of Elasticsearch, the 8.13 client version is required for that. Elasticsearch language clients are only backwards compatible with default distributions and without guarantees made.

• Creating an index
• Indexing a document
• Getting documents
• Searching documents
• Updating documents
• Deleting documents
• Deleting an index

NOTE: The minimum supported version of Node.js is v18.

The client versioning follows the Elastic Stack versioning, this means that major, minor, and patch releases are done following a precise schedule that often does not coincide with the Node.js release times.

To avoid support insecure and unsupported versions of Node.js, the client will drop the support of EOL versions of Node.js between minor releases. Typically, as soon as a Node.js version goes into EOL, the client will continue to support that version for at least another minor release. If you are using the client with a version of Node.js that will be unsupported soon, you will see a warning in your logs (the client will start logging the warning with two minors in advance).

Unless you are always using a supported version of Node.js, we recommend defining the client dependency in your package.json with the ~ instead of ^. In this way, you will lock the dependency on the minor release and not the major. (for example, ~7.10.0 instead of ^7.10.0).

Language clients are forward compatible; meaning that clients support communicating with greater or equal minor versions of Elasticsearch. Elasticsearch language clients are only backwards compatible with default distributions and without guarantees made.

To install a specific major of the client, run the following command:

npm install @elastic/elasticsearch@<major>

• Introduction
• Usage
• Client configuration
• API reference
• Authentication
• Observability
• Creating a child client
• Client helpers
• Typescript support
• Testing
• Examples

If you are using multiple versions of Elasticsearch, you need to use multiple versions of the client. In the past, install multiple versions of the same package was not possible, but with npm v6.9, you can do that via aliasing.

The command you must run to install different version of the client is:

npm install <alias>@npm:@elastic/elasticsearch@<version>

So for example if you need to install 7.x and 6.x, you will run:

npm install es6@npm:@elastic/elasticsearch@6
npm install es7@npm:@elastic/elasticsearch@7

And your package.json will look like the following:

"dependencies": {
  "es6": "npm:@elastic/elasticsearch@^6.7.0",
  "es7": "npm:@elastic/elasticsearch@^7.0.0"
}

You will require the packages from your code by using the alias you have defined.

const { Client: Client6 } = require('es6')
const { Client: Client7 } = require('es7')

const client6 = new Client6({
  cloud: { id: '<cloud-id>' },
  auth: { apiKey: 'base64EncodedKey' }
})
const client7 = new Client7({
  cloud: { id: '<cloud-id>' },
  auth: { apiKey: 'base64EncodedKey' }
})

client6.info().then(console.log, console.log)
client7.info().then(console.log, console.log)

Finally, if you want to install the client for the next version of Elasticsearch (the one that lives in Elasticsearch’s main branch), you can use the following command:

npm install esmain@github:elastic/elasticsearch-js

This software is licensed under the Apache License 2.0.