# Week 20

- [Day 1: Complex State, Immutable Updates, Forms](/seifxr10anz-content/week-20/day-1-complex-state-immutable-updates-forms.md)
- [Complex Objects in State](/seifxr10anz-content/week-20/day-1-complex-state-immutable-updates-forms/complex-objects-in-state.md)
- [Forms](/seifxr10anz-content/week-20/day-1-complex-state-immutable-updates-forms/forms.md)
- [Day 2: useEffect, API Integration](/seifxr10anz-content/week-20/day-2-useeffect-api-integration.md)
- [useEffect](/seifxr10anz-content/week-20/day-2-useeffect-api-integration/useeffect.md)
- [Day 3: React Router, Netlify](/seifxr10anz-content/week-20/day-3-react-router-netlify.md)
- [React Router](/seifxr10anz-content/week-20/day-3-react-router-netlify/react-router.md)
- [Netlify](/seifxr10anz-content/week-20/day-3-react-router-netlify/netlify.md)