Merge pull request #9 from CivicActions/part3

Add documentation for Part 3

Author: dcgoodwin2112

README.md

@@ -14,6 +14,7 @@ This course is intended to be as flexible as possible and to be approachable to
 
 - Part 1: [Create a Custom React Block or Route](documentation/content/1-create-custom-react-block.md)
 - Part 2: [Integrate React with a Custom Drupal Theme](documentation/content/2-integrate-react-drupal-theme.md)
+- Part 3: [Data Fetching in Decoupled React + Drupal](documentation/content/3-data-fetching.md)
 
 ## Development Environment Setup
 

documentation/content/3-data-fetching.md

@@ -0,0 +1,41 @@
+# Data Fetching in Decoupled React + Drupal
+
+[back to main project README](../../README.md)
+
+## Summary
+
+The goal for this exercise is to create a React app in Drupal that can fetch data from Drupal using the Drupal JSON API. We'll also look at loading data from an external API.
+
+For an extra challenge, you may use a data fetching library to handle loading states, errors states, and client-side caching.
+
+## Acceptance Criteria
+
+- Add a new React app in Drupal as a block module 
+  - This can be a new module or feel free to reuse the same custom module from [Part 1](./1-create-custom-react-block.md)
+- Sample content has been added to drupal. 
+  - The [Devel module](https://www.drupal.org/docs/contributed-modules/devel) can be useful for generating sample content, but you may also add content manually through the Drupal admin.
+- The JSON API module has been enabled in Drupal
+- A fetch request is being made from the The React app to the Drupal JSON API to load Drupal content in our React app.
+- A fetch request is being made from the React app to an external API to display non-drupal content in the same React app.
+  - The [PokeAPI](https://pokeapi.co/) is excellent for an external API option
+- [Challenge] A data fetching library is used to handle loading and error states for  fetch requests.
+- [Challenge] A data fetching library is used handle client-side caching.
+[TanStack Query](https://tanstack.com/query/latest) is recommended for both Challenge criteria, but there are many other libraries that solve similar problems.
+
+## Helpful Resources
+
+- Documentation: [JSON:API Drupal Docs](https://www.drupal.org/docs/core-modules-and-themes/core-modules/jsonapi-module/api-overview)
+- Tutorial: [JSON:API Resource Requests](https://drupalize.me/tutorial/jsonapi-resource-requests?p=3003)
+- Documentation: [Using the Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch)
+- Documentation: [Fetching data with Effects](https://react.dev/reference/react/useEffect#fetching-data-with-effects)
+
+### Extra Challenge Resources 
+
+- Documentation: [TanStack Query Docs](https://tanstack.com/query/latest/docs/react/overview)\
+- Examples: [TanStack Query Examples](https://tanstack.com/query/latest/docs/react/examples/react/basic)
+
+## Setup Instructions
+
+// TODO - Example Solution in-progress
+
+