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Coursera

Build AI Chatbots with React and AI APIs

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Overview

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This course teaches you how to build a fully functional AI chatbot application with React and Generative AI APIs. You will connect your app to real AI services, stream responses in real time, and build a multi-chat interface with a sidebar, chat switching, and per-chat history. Every step is practical and hands-on — you will write real code and see results immediately. The course also includes a dedicated module on common React mistakes in JSX, useState, and useEffect — so you can avoid the errors that slow most developers down and write cleaner React code from the start. Throughout the course, you'll explore: React and Generative AI Setup: Set up your development environment, create a React application, and learn how Generative AI APIs work — including pricing models and how to get your first API key. Building a Chatbot UI: Create the app layout, display chat messages, add a text input and send button, and handle message state in the chat. AI API Integration: Connect your chatbot to Google AI (Gemini), OpenAI (ChatGPT), and DeepSeek — and learn how to isolate AI logic for easy reuse and switching between models. Real-Time Streaming: Enable real-time response streaming from Gemini and ChatGPT so messages appear word by word as the AI generates them. Improving User Experience: Add loading states, dark mode, auto-scroll, markdown rendering, auto-resizable text input, and auto-focus to make the chatbot feel smooth and professional. Handling API Issues: Understand usage limits and rate limits, debug broken code, handle API errors gracefully, and display friendly error messages to users. Multi-Chat Sidebar: Build a sidebar that displays all chats, supports switching between them, shows full message history per chat, and includes a "New Chat" button with auto-generated titles. Common React Mistakes: Learn and fix the most frequent mistakes developers make in JSX syntax, useState hook usage, and useEffect hook behavior.

Syllabus

  • Beginning
    • This module introduces the basics of generative AI and workspace setup, guiding you through the creation and cleanup of a fresh React application using Vite.
  • Creating a User Interface for Chatbots
    • This module focuses on designing the visual interface of the chatbot, including the layout, message displays, and input controls.
  • Setting Up Chat with AI
    • This module covers how to obtain API keys and connect your React frontend to popular AI engines like Google Gemini and OpenAI ChatGPT.
  • Enhancing User Interaction with Chat
    • This module elevates the chatbot's user experience by adding polished interactive elements like markdown rendering, auto-scrolling, auto-resizing fields, and dark mode support.
  • Transmitting Messages Using AI
    • This module teaches you how to implement real-time message streaming with Gemini and ChatGPT APIs to make responses feel instantaneous.
  • DeepSeek API Connection
    • This module guides you through connecting your application to DeepSeek's API models using official keys and documentation.
  • Managing Problems When Using API
    • This module covers API troubleshooting, rate limit management, library updates, and displaying user-friendly error messages when APIs fail.
  • How to Connect the Anthropic (Claude) API
    • This module details how to obtain Anthropic credentials and integrate Claude's advanced language models with live streaming support.
  • xAI (Grok) API Connection
    • This module walks you through connecting your application to the xAI Grok model using official documentation and keys.
  • AI Assistant Choice and Improvements for Chatbots
    • This module shows you how to build selectors that allow users to seamlessly switch between different AI models and change visual themes.
  • Constructing the Sidebar with Chats
    • This module guides you in designing a responsive sidebar navigation that manages and displays multiple conversation histories.
  • Creating the "New Chat" Feature
    • This module covers dynamic thread management, enabling users to start new chats, auto-generate titles, and safely switch sessions during streams.
  • Common Errors - JSX syntax
    • This module addresses fundamental React layout and syntax mistakes, helping you write cleaner and error-free JSX code.
  • Common Errors with the useState Hook
    • This module breaks down typical state management issues, focusing on asynchronous state updates, hook rules, and state synchronization.
  • Common Errors with the useEffect Hook
    • This module covers how to avoid infinite render loops, manage dependencies, and clean up side effects safely in React.

Taught by

Anton Voroniuk and Dmytro Vasyliev

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