Build AI-Powered Apps with OpenAI and Node.js

This repo is a companion to the Build AI-Powered Apps with OpenAI and Node.js course on Frontend Masters.

Materials

• Course Notes

Errata

Document QA Query Function Lesson

A few of the Langchain methods used in this course have been deprecated. Here's an alternative approach:

Install the Langchain community module

npm i @langchain/community

Import the loaders

import { PDFLoader } from '@langchain/community/document_loaders/fs/pdf'
import { YoutubeLoader } from '@langchain/community/document_loaders/web/youtube'

Create the loaders using the community methods:

In docsFromYTVideo:

const loader = YoutubeLoader.createFromUrl(video, { language: 'en', addVideoInfo: true, })
return loader.load( new CharacterTextSplitter({ separator: ' ', chunkSize: 2500, chunkOverlap: 200, }) )

In docsFromPDF:

const docsFromPDF = async () => { const loader = new PDFLoader('./xbox.pdf')
return loader.load( new CharacterTextSplitter({ separator: ' ', chunkSize: 2500, chunkOverlap: 200, }) ) }