Integrating LangChain with JavaScript for Web Developers

certificate
Recording and certification are available to Multipass and Full ticket holders only
Please login if you have one.
Rate this content
Bookmark

Dive into the world of AI with our interactive workshop designed specifically for web developers. "Hands-On AI: Integrating LangChain with JavaScript for Web Developers" offers a unique opportunity to bridge the gap between AI and web development. Despite the prominence of Python in AI development, the vast potential of JavaScript remains largely untapped. This workshop aims to change that.

Throughout this hands-on session, participants will learn how to leverage LangChain—a tool designed to make large language models more accessible and useful—to build dynamic AI agents directly within JavaScript environments. This approach opens up new possibilities for enhancing web applications with intelligent features, from automated customer support to content generation and beyond.

We'll start with the basics of LangChain and AI models, ensuring a solid foundation even for those new to AI. From there, we'll dive into practical exercises that demonstrate how to integrate these technologies into real-world JavaScript projects. Participants will work through examples, facing and overcoming the challenges of making AI work seamlessly on the web.

This workshop is more than just a learning experience; it's a chance to be at the forefront of an emerging field. By the end, attendees will not only have gained valuable skills but also created AI-enhanced features they can take back to their projects or workplaces.

Whether you're a seasoned web developer curious about AI or looking to expand your skillset into new and exciting areas, "Hands-On AI: Integrating LangChain with JavaScript for Web Developers" is your gateway to the future of web development. Join us to unlock the potential of AI in your web projects, making them smarter, more interactive, and more engaging for users.

This workshop has been presented at React Summit 2024, check out the latest edition of this React Conference.

FAQ

Embeddings in Lanchain represent chunks of documents or queries in a vector space. These embeddings are used to perform semantic searches to find relevant context or answers from large datasets.

The 'system message' in prompt templates sets initial instructions for the LLM, guiding how it should respond to user queries. For example, it can make the LLM answer questions as a specific character or follow particular guidelines.

Creating a RAG-based application involves: 1) Loading the document, 2) Splitting the document into smaller chunks, 3) Creating embeddings of these chunks, 4) Storing these embeddings in a Vector Database, 5) Retrieving relevant context based on a query, and 6) Passing this context to an LLM to generate the final answer.

The OpenAI API key should be stored in an environment file, commonly named .env or env.local, which should be in the root folder of your project.

Context length is important because LLMs have a token limit, which means you cannot feed them excessively long prompts. Shortening the context length helps in reducing the cost of each call to an LLM and ensures that the prompt fits within the model's token limit.

You can integrate a PDF or Slack channel history with an AI LLM by using Retrieval Augmented Generation (RAG). This involves extracting only the relevant context from the entire history or document and then passing that to the LLM for generating the response.

The workshop covers Zero-shot, Few-shot, Chain of Thought, and Retrieval Augmented Generation (RAG) prompt engineering techniques.

Vector Databases in Lanchain are used to store embeddings, which are vector representations of chunks of documents or queries. This specialized database allows for efficient retrieval of relevant context when querying large, unstructured datasets.

You can create structured output from an LLM in Lanchain by defining a schema using libraries like Zod. This schema helps in formatting the output as a JSON or any other structured format.

RAG stands for Retrieval Augmented Generation, a technique in prompt engineering that involves writing a big prompt with step-by-step instructions and examples, then extracting the relevant context only when needed. This helps in reducing the context length and cost of using Large Language Models (LLMs).

Vivek Nayyar
Vivek Nayyar
92 min
26 Jun, 2024

Comments

Sign in or register to post your comment.
Video Summary and Transcription
The Workshop introduced various aspects of prompt engineering, including Retrieval Augmented Generation (RAG) which allows for shorter context length. It covered topics such as coding with LLM, connecting to LLM models, getting structured output, defining output format, and using prompt templates with dynamic variables. The Workshop also delved into loading and manipulating documents, creating embeddings, and searching in VectorDB. The final sections explored using LLM with retriever and retrieving answers from the vector database. The Workshop provided valuable insights and resources for further learning in the field of software development and engineering.
Video transcription and chapters available for users with access.

Watch more workshops on topic

React, TypeScript, and TDD
React Advanced 2021React Advanced 2021
174 min
React, TypeScript, and TDD
Top Content
Featured WorkshopFree
Paul Everitt
Paul Everitt
ReactJS is wildly popular and thus wildly supported. TypeScript is increasingly popular, and thus increasingly supported.

The two together? Not as much. Given that they both change quickly, it's hard to find accurate learning materials.

React+TypeScript, with JetBrains IDEs? That three-part combination is the topic of this series. We'll show a little about a lot. Meaning, the key steps to getting productive, in the IDE, for React projects using TypeScript. Along the way we'll show test-driven development and emphasize tips-and-tricks in the IDE.
Mastering advanced concepts in TypeScript
React Summit US 2023React Summit US 2023
132 min
Mastering advanced concepts in TypeScript
Top Content
Featured WorkshopFree
Jiri Lojda
Jiri Lojda
TypeScript is not just types and interfaces. Join this workshop to master more advanced features of TypeScript that will make your code bullet-proof. We will cover conditional types and infer notation, template strings and how to map over union types and object/array properties. Each topic will be demonstrated on a sample application that was written with basic types or no types at all and we will together improve the code so you get more familiar with each feature and can bring this new knowledge directly into your projects.
You will learn:- - What are conditional types and infer notation- What are template strings- How to map over union types and object/array properties.
Master JavaScript Patterns
JSNation 2024JSNation 2024
145 min
Master JavaScript Patterns
Top Content
Featured Workshop
Adrian Hajdin
Adrian Hajdin
During this workshop, participants will review the essential JavaScript patterns that every developer should know. Through hands-on exercises, real-world examples, and interactive discussions, attendees will deepen their understanding of best practices for organizing code, solving common challenges, and designing scalable architectures. By the end of the workshop, participants will gain newfound confidence in their ability to write high-quality JavaScript code that stands the test of time.
Points Covered:
1. Introduction to JavaScript Patterns2. Foundational Patterns3. Object Creation Patterns4. Behavioral Patterns5. Architectural Patterns6. Hands-On Exercises and Case Studies
How It Will Help Developers:
- Gain a deep understanding of JavaScript patterns and their applications in real-world scenarios- Learn best practices for organizing code, solving common challenges, and designing scalable architectures- Enhance problem-solving skills and code readability- Improve collaboration and communication within development teams- Accelerate career growth and opportunities for advancement in the software industry
Using CodeMirror to Build a JavaScript Editor with Linting and AutoComplete
React Day Berlin 2022React Day Berlin 2022
86 min
Using CodeMirror to Build a JavaScript Editor with Linting and AutoComplete
Top Content
WorkshopFree
Hussien Khayoon
Kahvi Patel
2 authors
Using a library might seem easy at first glance, but how do you choose the right library? How do you upgrade an existing one? And how do you wade through the documentation to find what you want?
In this workshop, we’ll discuss all these finer points while going through a general example of building a code editor using CodeMirror in React. All while sharing some of the nuances our team learned about using this library and some problems we encountered.
From Todo App to B2B SaaS with Next.js and Clerk
React Summit US 2023React Summit US 2023
153 min
From Todo App to B2B SaaS with Next.js and Clerk
Top Content
WorkshopFree
Dev Agrawal
Dev Agrawal
If you’re like me, you probably have a million side-project ideas, some that could even make you money as a micro SaaS, or could turn out to be the next billion dollar startup. But how do you know which ones? How do you go from an idea into a functioning product that can be put into the hands of paying customers without quitting your job and sinking all of your time and investment into it? How can your solo side-projects compete with applications built by enormous teams and large enterprise companies?
Building rich SaaS products comes with technical challenges like infrastructure, scaling, availability, security, and complicated subsystems like auth and payments. This is why it’s often the already established tech giants who can reasonably build and operate products like that. However, a new generation of devtools are enabling us developers to easily build complete solutions that take advantage of the best cloud infrastructure available, and offer an experience that allows you to rapidly iterate on your ideas for a low cost of $0. They take all the technical challenges of building and operating software products away from you so that you only have to spend your time building the features that your users want, giving you a reasonable chance to compete against the market by staying incredibly agile and responsive to the needs of users.
In this 3 hour workshop you will start with a simple task management application built with React and Next.js and turn it into a scalable and fully functioning SaaS product by integrating a scalable database (PlanetScale), multi-tenant authentication (Clerk), and subscription based payments (Stripe). You will also learn how the principles of agile software development and domain driven design can help you build products quickly and cost-efficiently, and compete with existing solutions.
Testing Web Applications Using Cypress
TestJS Summit - January, 2021TestJS Summit - January, 2021
173 min
Testing Web Applications Using Cypress
Top Content
WorkshopFree
Gleb Bahmutov
Gleb Bahmutov
This workshop will teach you the basics of writing useful end-to-end tests using Cypress Test Runner.
We will cover writing tests, covering every application feature, structuring tests, intercepting network requests, and setting up the backend data.
Anyone who knows JavaScript programming language and has NPM installed would be able to follow along.

Check out more articles and videos

We constantly think of articles and videos that might spark Git people interest / skill us up or help building a stellar career

Scaling Up with Remix and Micro Frontends
Remix Conf Europe 2022Remix Conf Europe 2022
23 min
Scaling Up with Remix and Micro Frontends
Top Content
This talk discusses the usage of Microfrontends in Remix and introduces the Tiny Frontend library. Kazoo, a used car buying platform, follows a domain-driven design approach and encountered issues with granular slicing. Tiny Frontend aims to solve the slicing problem and promotes type safety and compatibility of shared dependencies. The speaker demonstrates how Tiny Frontend works with server-side rendering and how Remix can consume and update components without redeploying the app. The talk also explores the usage of micro frontends and the future support for Webpack Module Federation in Remix.
Modern Web Debugging
JSNation 2023JSNation 2023
29 min
Modern Web Debugging
Top Content
This Talk discusses modern web debugging and the latest updates in Chrome DevTools. It highlights new features that help pinpoint issues quicker, improved file visibility and source mapping, and ignoring and configuring files. The Breakpoints panel in DevTools has been redesigned for easier access and management. The Talk also covers the challenges of debugging with source maps and the efforts to standardize the source map format. Lastly, it provides tips for improving productivity with DevTools and emphasizes the importance of reporting bugs and using source maps for debugging production code.
The Future of Performance Tooling
JSNation 2022JSNation 2022
21 min
The Future of Performance Tooling
Top Content
Today's Talk discusses the future of performance tooling, focusing on user-centric, actionable, and contextual approaches. The introduction highlights Adi Osmani's expertise in performance tools and his passion for DevTools features. The Talk explores the integration of user flows into DevTools and Lighthouse, enabling performance measurement and optimization. It also showcases the import/export feature for user flows and the collaboration potential with Lighthouse. The Talk further delves into the use of flows with other tools like web page test and Cypress, offering cross-browser testing capabilities. The actionable aspect emphasizes the importance of metrics like Interaction to Next Paint and Total Blocking Time, as well as the improvements in Lighthouse and performance debugging tools. Lastly, the Talk emphasizes the iterative nature of performance improvement and the user-centric, actionable, and contextual future of performance tooling.
Full Stack Components
Remix Conf Europe 2022Remix Conf Europe 2022
37 min
Full Stack Components
Top Content
RemixConf EU discussed full stack components and their benefits, such as marrying the backend and UI in the same file. The talk demonstrated the implementation of a combo box with search functionality using Remix and the Downshift library. It also highlighted the ease of creating resource routes in Remix and the importance of code organization and maintainability in full stack components. The speaker expressed gratitude towards the audience and discussed the future of Remix, including its acquisition by Shopify and the potential for collaboration with Hydrogen.
Debugging JS
React Summit 2023React Summit 2023
24 min
Debugging JS
Top Content
Watch video: Debugging JS
Debugging JavaScript is a crucial skill that is often overlooked in the industry. It is important to understand the problem, reproduce the issue, and identify the root cause. Having a variety of debugging tools and techniques, such as console methods and graphical debuggers, is beneficial. Replay is a time-traveling debugger for JavaScript that allows users to record and inspect bugs. It works with Redux, plain React, and even minified code with the help of source maps.
Making JavaScript on WebAssembly Fast
JSNation Live 2021JSNation Live 2021
29 min
Making JavaScript on WebAssembly Fast
Top Content
WebAssembly enables optimizing JavaScript performance for different environments by deploying the JavaScript engine as a portable WebAssembly module. By making JavaScript on WebAssembly fast, instances can be created for each request, reducing latency and security risks. Initialization and runtime phases can be improved with tools like Wiser and snapshotting, resulting in faster startup times. Optimizing JavaScript performance in WebAssembly can be achieved through techniques like ahead-of-time compilation and inline caching. WebAssembly usage is growing outside the web, offering benefits like isolation and portability. Build sizes and snapshotting in WebAssembly depend on the application, and more information can be found on the Mozilla Hacks website and Bike Reliance site.