About this course
Learn the building blocks of generative AI applications in JavaScript. The series connects language models and prompt design with RAG, LangChain.js, local models through Ollama, Azure services, and streaming responses. It suits JavaScript developers moving beyond a single prompt into a complete application workflow.
What you can learn
- Understand LLMs and prompt design
- Use retrieval to improve answer relevance
- Explore LangChain.js and local model workflows
- Review hosting, storage and streamed responses
Course at a glance
| Provider | Microsoft |
|---|---|
| Platform | YouTube · Microsoft Developer |
| Access | Free Video |
| Level | Intermediate — WikiFree audience assessment |
| Language | English |
| Selected lessons | 11 |
| Video duration | 1h 43m · allow extra time for reflection and practice |
| Details checked | 9 October 2026 |
Try this learning exercise
Outline a JavaScript assistant for a small fictional FAQ. Separate the interface, retrieval step, model call, and streamed output. Write tests for a supported question and a question with no supporting source.
How to follow the course
Choose a lesson from the list or search for a specific topic. Use Previous and Next to continue, and mark lessons complete as you go. Progress is saved in this browser without a WikiFree account.
Free access, tools and certificates
The selected public YouTube videos are free to watch. No paid subscription, payment card, examination, or software purchase is required for this video learning path. This listing does not include a Microsoft certification, assessed assignment, or instructor feedback.
The learning exercise above can be completed as a written plan without provisioning services. Reproducing demonstrations with Azure, hosted models, enterprise products, hardware, or optional software may require an account, separate access, or paid resources. Those activities are not required to complete the video course. Recorded interfaces and commands may differ from current versions.
Official Microsoft Developer playlist source ↗
Related courses for your next step
- Review a lower-level optionFree Generative AI Course: Build AI Applications
Focus: Generative AI · Large language models
Beginner - Compare another approachFree AI App Development Course: Local LLMs and RAG
Focus: Local LLM inference · RAG application patterns
Intermediate - Compare another approachFree RAG Course: Retrieval, Vector Search and AI Agents
Focus: Retrieval-augmented generation · Sparse and dense retrieval
Intermediate
Compare course focus, level and study time
| Course | Level | Focus | Study time |
|---|---|---|---|
| This course — Free Generative AI with JavaScript Course: LLMs and RAG | Intermediate | Understand LLMs and prompt design · Use retrieval to improve answer relevance · Explore LangChain.js and local model workflows | 1h 43m of video; practice time is additional |
| Free Generative AI Course: Build AI Applications | Beginner | Generative AI · Large language models · Prompt engineering | 8h 39m of video; practice time is additional |
| Free AI App Development Course: Local LLMs and RAG | Intermediate | Local LLM inference · RAG application patterns · AI tool calling | 8h 7m of video; practice time is additional |
| Free RAG Course: Retrieval, Vector Search and AI Agents | Intermediate | Retrieval-augmented generation · Sparse and dense retrieval · Hybrid search | 3h 22m of video; practice time is additional |
Provider: Microsoft. Videos play from the Microsoft Developer channel on YouTube.
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