Data & Analytics

Elasticsearch Search Engine

Build powerful full-text search, analytics, and log aggregation with Elasticsearch and the Node.js client.

Claude Code Cursor Copilot

Overview

Elasticsearch is a distributed search and analytics engine built on Apache Lucene. It provides near-real-time full-text search with support for complex queries, aggregations, relevance scoring, and geospatial search. The @elastic/elasticsearch Node.js client provides a fully typed API that maps directly to the Elasticsearch REST API.

The search engine excels at text analysis with built-in analyzers for tokenization, stemming, stopword removal, and synonym matching. Custom analyzers can be configured per field for language-specific requirements. Queries support boolean logic, phrase matching, fuzzy matching, wildcards, and boosting. The suggest API provides autocomplete, spell correction, and "did you mean" functionality.

Beyond search, Elasticsearch is widely used for log aggregation (ELK stack), metrics analytics, and security analytics. Aggregations provide real-time analytics capabilities including terms, date histograms, percentiles, geohash grids, and pipeline aggregations. The Kibana visualization layer connects directly to Elasticsearch for dashboards and exploration. Elasticsearch can be self-hosted or used as a managed service through Elastic Cloud.

Who Is This For?

Build full-text product search with faceted filtering
Implement autocomplete with search suggestions
Aggregate application logs for monitoring and debugging
Create analytics dashboards with real-time aggregations

Installation

Setup for Claude Code

npm install @elastic/elasticsearch

Configuration

import { Client } from "@elastic/elasticsearch"

const client = new Client({
  node: process.env.ELASTICSEARCH_URL,
  auth: { apiKey: process.env.ELASTICSEARCH_API_KEY! },
})

// Search with highlights
const result = await client.search({
  index: "products",
  query: {
    multi_match: {
      query: "wireless headphones",
      fields: ["name^3", "description", "category"],
      fuzziness: "AUTO",
    },
  },
  highlight: { fields: { name: {}, description: {} } },
})