by kentcdodds

This is the latest advanced react patterns workshop

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🀯 Advanced React Patterns πŸš€ EpicReact.Dev

Learn how to build simple and flexible React Components and Hooks using modern patterns

Not only learn great patterns you can use but also the strengths and weaknesses of each, so you know which to reach for to provide your custom hooks and components the flexibility and power you need.

Learn React from Start to Finish

Build Status AppVeyor Build Status GPL 3.0 License Code of Conduct <!-- prettier-ignore-end -->


System Requirements

All of these must be available in your

. To verify things are set up properly, you can run this:
git --version
node --version
npm --version

If you have trouble with any of these, learn more about the PATH environment variable and how to fix it here for windows or mac/linux.


After you've made sure to have the correct things (and versions) installed, you should be able to just run a few commands to get set up:

git clone
cd advanced-react-patterns
npm run setup --silent

This may take a few minutes. It will ask you for your email. This is optional and just automatically adds your email to the links in the project to make filling out some forms easier.

If you get any errors, please read through them and see if you can find out what the problem is. If you can't work it out on your own then please file an issue and provide all the output from the commands you ran (even if it's a lot).

Running the app

To get the app up and running (and really see if it worked), run:

npm start

This should start up your browser. If you're familiar, this is a standard react-scripts application.

You can also open the deployment of the app on Netlify.

Running the tests

npm test

This will start Jest in watch mode. Read the output and play around with it. The tests are there to help you reach the final version, however sometimes you can accomplish the task and the tests still fail if you implement things differently than I do in my solution, so don't look to them as a complete authority.


  • src/exercise/
    : Background, Exercise Instructions, Extra Credit
  • src/exercise/00.js
    : Exercise with Emoji helpers
  • src/__tests__/00.js
    : Tests
  • src/final/00.js
    : Final version
  • src/final/00.extra-0.js
    : Final version of extra credit

The purpose of the exercise is not for you to work through all the material. It's intended to get your brain thinking about the right questions to ask me as I walk through the material.

Helpful Emoji 🐨 πŸ’ͺ 🏁 πŸ’° πŸ’― πŸ¦‰ πŸ“œ πŸ’£ πŸ‘¨β€πŸ’Ό 🚨

Each exercise has comments in it to help you get through the exercise. These fun emoji characters are here to help you.

  • Kody the Koala Bear 🐨 will tell you when there's something specific you should do
  • Matthew the Muscle πŸ’ͺ will indicate what you're working with an exercise
  • Chuck the Checkered Flag 🏁 will indicate that you're working with a final version
  • Marty the Money Bag πŸ’° will give you specific tips (and sometimes code) along the way
  • Hannah the Hundred πŸ’― will give you extra challenges you can do if you finish the exercises early.
  • Olivia the Owl πŸ¦‰ will give you useful tidbits/best practice notes and a link for elaboration and feedback.
  • Dominic the Document πŸ“œ will give you links to useful documentation
  • Berry the Bomb πŸ’£ will be hanging around anywhere you need to blow stuff up (delete code)
  • Peter the Product Manager πŸ‘¨β€πŸ’Ό helps us know what our users want
  • Alfred the Alert 🚨 will occasionally show up in the test failures with potential explanations for why the tests are failing.


Thanks goes to these wonderful people (emoji key):

Kent C. Dodds

πŸ’» πŸ“– πŸš‡ ⚠️


πŸ› πŸ€”

David Lannoye

πŸ› πŸ“–

Colin Cummings

πŸ’» ⚠️

Benji Koltai


Sumit Bagga


Yury Tarabanko


Alex Wendte


Ives van Hoorne

πŸ’» ⚠️

Łukasz Gandecki


Deniz Tetik



πŸ–‹ πŸ’»

Justin Dorfman


Alex Munoz


Marco Moretti


This project follows the all-contributors specification. Contributions of any kind welcome!

Workshop Feedback

Each exercise has an Elaboration and Feedback link. Please fill that out after the exercise and instruction.

At the end of the workshop, please go to this URL to give overall feedback. Thank you!

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