Getting started with LangChainJS

LangChain is a JavaScript library designed to simplify interactions with large language models (LLMs), enabling developers to build AI-powered applications efficiently. It offers various modules, such as document loaders and transformers, that facilitate data handling from diverse sources, including files and web pages, while also providing tools for generating and storing vector embeddings. These features are crucial for creating applications like custom chatbots, which can answer questions based on specific datasets. The guide explains foundational AI concepts like vector embeddings and demonstrates how LangChain abstracts complex processes, such as training models and managing embeddings in vector databases. Additionally, it showcases building a custom chatbot using LangChainJS, highlighting the ease of integrating AI into applications with this open-source framework.