Langchain Tutorial For Typescript and Javascript Developers
- LangChain typescript tutorial video
- The visual explanation diagram is in the
visual-image
folder.
What is Langchain?
In simple terms, langchain is a framework and library of useful templates and tools that make it easier to build large language model applications that use custom data and external tools.
Essentially, langchain makes it easier to build chatbots for your own data and "personal assistant" bots that respond to natural language.
Quick install
After you clone the repo, follow these instructions:
-
Install packages
npm install
-
Add OpenAI, Pinecone and SerpApi keys as environment variables
- create a
.env
file in the root of the folder - copy the environmental variables from
.env.example
into.env
and replace with the keys from respective websites
Usage
To run a specific example in the repo, simply run the bash script below and replace "examplePath" with the relative path from src/index.ts to the example file:
npm run start {examplePath}
For example:
npm run start ./prompts/basic.ts
Resources
Credit
This repository heavily borrows from:
- LangchainJS - official langchain library