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Documentation for LangChain.js
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2026-02-16 12:25:10
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LangChain.js v0.3 v0.2 v0.1 Preparing search index... The search index is not available LangChain.js LangChain.js 🦜️🔗 LangChain.js ⚡ Building applications with LLMs through composability ⚡ Looking for the Python version? Check out LangChain . To help you ship LangChain apps to production faster, check out LangSmith . LangSmith is a unified developer platform for building, testing, and monitoring LLM applications. ⚡️ Quick Install You can use npm, yarn, or pnpm to install LangChain.js npm install -S langchain or yarn add langchain or pnpm add langchain 🌐 Supported Environments LangChain is written in TypeScript and can be used in: Node.js (ESM and CommonJS) - 18.x, 19.x, 20.x, 22.x Cloudflare Workers Vercel / Next.js (Browser, Serverless and Edge functions) Supabase Edge Functions Browser Deno 🤔 What is LangChain? LangChain is a framework for developing applications powered by language models. It enables applications that: Are co...
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