# Step 12: Summary

In this tutorial you:

- Built a full stack application using React and Express
- Shared code between the frontend and the backend
- Created a UI library
- Used Nx dep graph capabilities to only retest and rebuild what is affected

## Learn More

Watch the video showing how to use Nx build full-stack applications.

<iframe width="560" height="315" src="https://www.youtube.com/embed/Jxh_--FeJeY" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

### Read Fundamentals

- [Using Modern Tools](/react/fundamentals/use-modern-tools)
- [Building Full-Stack Applications](/react/fundamentals/build-full-stack-applications)
- [Develop using Monorepos and Automation](/react/fundamentals/monorepos-automation)