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React.js AI Chatbot built with ChatGPT, Gemini and DeepSeek

Name: React.js AI Chatbot built with ChatGPT, Gemini and DeepSeek
Rating: 4.5 (614 reviews)

React Project: Build a Real-Time AI Chatbot with ChatGPT, Gemini, DeepSeek, Claude & Grok API Integration

Role Play

Created byAnton Voroniuk, Dmytro Vasyliev, Anton Voroniuk Support, Dmytro Vasyliev Support

Last updated 6/2026

English

What you'll learn

How to build a functional AI Chatbot App using React.js, Vite, enhance UI/UX with chat Auto-Scrolling, Markdown support, Light/Dark Mode, Loading state.
How to integrate ChatGPT, Gemini, DeepSeek, Claude and Grok AI models using API’s for real-chat conversations and message streaming.
What key differences between AI tools and APIs, how to handle rate limits, fix API errors, and debug AI integrations effectively.
And much more to enhance skills in React.js and AI integration.

Course content

52 sections • 312 lectures • 30h 57m total length

Welcome to the course0:59
This lesson is an introduction to the course.
Course Requirements0:32
In this lesson you will get a few tips for learning on the platform.
How to Study on Udemy2:15
In this lesson, you will explore how to study on the platform.
How to Use Code Resources4:16
In this lesson, you are going to learn how to download the code sources for the application and lessons.

Project Overview4:19
In this lesson you will get an overview of the chatbot, see its design, and explore all the features we’ll be building together.
Your Journey in React.js AI Chatbot
Introduction to Generative AI3:00
In this lesson you will learn what generative AI is and see real-life examples of how it is used.
AI APIs Pricing Model1:57
In this lesson you will learn about pricing models for AI APIs, which APIs are free and which APIs require an account to use.
Setting Up Environment1:16
In this lesson you will start setting up your development environment, everything you need to have to create React application.
Creating React Application2:19
In this lesson you will learn how to quickly create a React application that is ready to run out of the box.
Cleaning Up Application3:02
In this lesson you will clean up a bit our React application from not necessary code.

Building the App Layout2:43
In this lesson you will learn how to build application layout for chatbot.
Displaying Chat Messages6:11
In this lesson you will learn how to display and styles chat messages in the application.
Adding Text Input and Send Button4:06
In this lesson you will learn how to add a text input and send button, enabling users to type and send messages to the AI assistant
Handling Messages in the Chat8:29
In this lesson you will learn how to implement adding new messages form a user into conversation.

Overview of Popular AI APIs4:15
In this lesson you will learn about popular AI APIs, such as Google AI (Gemini) and OpenAI (ChatGPT)
Getting API Key for Google AI3:15
In this lesson you will learn how to create Google AI API key and how to store it in the application.
Connect Google AI (Gemini) for Chatting7:17
In this lesson you will learn how to connect Google AI API into your application.
Isolating Google AI logic for Reusability6:07
In this lesson you will learn how to separate the Google AI logic into separate file for easier reuse.
Getting API Key for Open AI1:44
In this lesson you will learn how to create Open AI API key and how to store it in the application.
Connect Open AI (ChatGPT) for Chatting10:40
In this lesson you will learn how to connect Open AI API into your application.

Displaying Loading State4:37
In this lesson you will learn how to create a loader component and display it while waiting for a response from the API.
Adding Markdown Support to Messages1:54
In this lesson you will learn how to add markdown support to chat messages, allowing you to display formatted content such as bullet lists, bold text, and more.
Making Text Field Auto-Resizable2:22
In this lesson, you will learn how to make the text field height auto-resizable when the user enters long text, allowing it to expand and take up more lines.
Disable Chat Controls during Loading1:49
In this lesson, you will learn how to disable the text field and send button during loading, preventing the user from entering new text or sending messages.
Applying Auto-Focus to Text Field2:05
In this lesson you will learn how to set up auto-focus for the text field, so it automatically activates whenever the chatbot generates a response, improving the flow of the conversation.
Adding Auto-Scrolling to Bottom3:23
In this lesson you will learn how to implement auto-scrolling to the bottom of the chat, ensuring users can always see the latest response.
Improving Auto-Scrolling Behaviour8:43
In this lesson you will learn how to improve the auto-scrolling feature to focus on the latest user message, making it easier for users to follow the most recent conversation.
Adding Dark Mode Support7:27
In this lesson you will learn how to add dark mode support to your chat application, allowing users to switch between light and dark themes for a better user experience.

Connect Google AI (Gemini) for Streaming4:34
In this lesson you will learn how to integrate Google AI (Gemini) for real-time streaming, enabling dynamic and continuous responses from the AI.
Enabling Real-Time Chat Streaming8:46
In this lesson you will learn how to integrate the chat streaming AI feature into the app component and handle the loading state efficiently.
Connect Open AI (ChatGPT) for Streaming3:01
In this lesson you will learn how to integrate Open AI (ChatGPT) for real-time streaming, enabling dynamic and continuous responses from the AI.

Usage and Rate Limits of AI API’s4:08
In this lesson you will learn about usage and limitations of AI API’s
Code Not Working? Learn How to Debug4:01
In this lesson you will learn how to debug your application if smth doesn't work as expected
Dealing with API Errors from AI Services2:48
In this lesson you will learn what mean different error codes from AI API's
Using New Google AI (Gemini) Library7:15
In this lesson you will switch to new google AI SDK, because the old one was deprecated
Handle and Display Friendly Error Messages8:43
In this lesson you will learn how to handle and display API errors from AI services in a chat

Overview of Anthropic (Claude) Models3:19
In this lesson, you'll learn about such popular AI APIs as Anthropic and its Cloud Family Models: Sonnet, Haiku and Opus.
Getting API Key for Anthropic (Claude)2:28
In this lesson you will learn how to create Anthropic API key and how to store it in the application.
Connect Anthropic (Claude) for Chatting11:37
In this lesson you will learn how to connect Anthropic API into your application.

Requirements

Basic knowledge of React. js
Basic knowledge of JavaScript (we provide reading materials for those who are not familiar with JavaScript)
Basic knowledge of HTML/CSS

Description

Unlock the power of AI to create smart, interactive apps that engage users in real time. You can easily add advanced features to your projects and build solutions that stand out in today’s market using OpenAI (ChatGPT), Google AI (Gemini), DeepSeek (R1 and V3), Anthropic (Cloud Sonnet and Haiku) and xAI (Grok 3) AI API’s.

What's in this course?

AI CHATBOT: Learn how to build an AI Chatbot with React, integrate Google AI, OpenAI, DeepSeek, Claude, and xAI APIs, and enhance Chat UI with Streaming, Themes, and Multi-Chat Features.
REACT MISTAKES: Learn how to fix React Beginner Mistakes — Missing Keys, Mutating State, Reading State Right After Update, Wrong useEffect Dependencies, Infinite Loops, and Broken Controlled Inputs.
PROMPTS: Learn how to apply Prompt Engineering, fix Mistakes, use Best Practices, and write Role-Based Prompts with Advanced Techniques.
CHAT GPT: Learn how to use ChatGPT for Coding, Research, and Projects, customize with Custom Instructions, manage Memory, explore Models, etc.
GITHUB COPILOT: Learn how to use GitHub Copilot in VS Code, explore Code Completions, Chat Modes, Custom Instructions, and Prompt Files for smarter AI Coding.
CURSOR: Learn how to use Cursor AI with Tab Completions, Chat Modes, Plan Mode, Rules, and Memories for faster AI Coding.
WINDSURF: Learn how to use Windsurf Editor with Supercomplete, Cascade Chat Modes, Plan Mode, DeepWiki, Rules, and Memories for efficient AI Development.
SOFT SKILLS: Learn how to improve Soft Skills for Developers, boost Remote Productivity, collaborate in Teams, estimate Tasks, and grow faster with Mentors.

This Course includes

Theory and Practice: Lectures with many practical examples (3-10 min lessons duration).
Source Code Examples: Full access to source code for all projects and exercises (practice on your own).
Udemy Certificate: which you will receive after completing the course.
Support: If you have any questions, we will always be willing to answer them.

Meet your instructor!

Dmytro Vasyliev - Senior Front-end Engineer with more than 10 years of professional experience in developing complex Web Applications. I have extensive experience with React and other frameworks, having used it in various projects to build dynamic and efficient user interfaces.

Do you need to be concerned?

This course comes with a 30-day money-back guarantee.

Join our course today to learn how to build your first application in React!

Who this course is for:

Developers and students with fundamental React. js knowledge looking to explore and learn something new
People who want to learn how to integrate Open AI (ChatGPT), Google AI (Gemini) and DeepSeek (R1 and V3) into frontend applications

React.js AI Chatbot built with ChatGPT, Gemini and DeepSeek

What you'll learn

Explore related topics

Course content

Introduction4 lectures • 8min

AI CHATBOT: Getting Started7 lectures • 16min

AI CHATBOT: Building Chatbot UI4 lectures • 21min

AI CHATBOT: Implementing Chat with AI6 lectures • 33min

AI CHATBOT: Improving User experience with Chat8 lectures • 32min

AI CHATBOT: Streaming Messages with AI3 lectures • 16min

AI CHATBOT: DeepSeek API Integration3 lectures • 12min

AI CHATBOT: Dealing with Issues when using API5 lectures • 27min

AI CHATBOT: Anthropic (Claude) API Integration3 lectures • 17min

AI CHATBOT: xAI (Grok) API Integration3 lectures • 11min

Requirements

Description

Who this course is for: