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How to use react-in-patterns: read the free React patterns book

Updated · written with AI from the project's own documentation and checked against our catalogue data

react-in-patterns is a free book by krasimir about design patterns and techniques used while building user interfaces with React. This guide shows you how to get the book, what topics it covers, and how to read it in the order that makes sense for you. By the end you will know which chapters matter for your work and where the book's age may limit what you apply.

React in patternskrasimir/react-in-patterns · ★ 13.6k · MIT

Quick start

  1. 1Check your level. Confirm you know basic React and JavaScript, because the book assumes some familiarity with its topics.
  2. 2Pick a format. Open the web version or download the PDF, Mobi or ePub file from the README links.
  3. 3Read the Foundation chapters. Start with communication, event handlers and composition to learn the core component patterns.
  4. 4Read the data flow chapters. Move on to one-direction data flow, Flux and Redux to compare state management approaches.
  5. 5Clone the code if needed. Run the git clone command to get the code samples and try them alongside the chapters.
  6. 6Check older material. Compare any context examples with current React documentation, since the book references pre-16.3 context.

What react-in-patterns is and who it is for

The project is a book that explains common approaches used when developing with React, a JavaScript library, and the reasons behind them. Its goal is to help developers understand these approaches rather than give step-by-step app instructions.

It fits developers who already know basic React and want to learn common structuring patterns, people comparing approaches such as Flux, Redux, or context-based dependency injection, and students who want to see how React apps are organized in practice.

  • Good fit: developers with basic React knowledge who want structuring patterns
  • Good fit: readers comparing Flux, Redux and context-based dependency injection
  • Less suited: complete beginners to JavaScript or React, since the README describes no beginner path
  • Less suited: readers who need current React features, because the README references older versions such as pre-16.3 context

Get the book: read online, PDF, Mobi or ePub

The README links to four formats: a web version, a PDF, a Mobi file and an ePub file. The PDF, Mobi and ePub formats let you read offline on a device of your choice.

The project lists no separate prerequisites for reading. Reading the book does not require installing anything from the repository.

  • Web: the book in your browser
  • PDF: a file for desktop or tablet readers
  • Mobi and ePub: files for e-readers and reading apps

Clone the repository to get the source code

If you want the code samples used in the book, clone the repository with the command below. The README says the samples are available in the code folder of the repository.

The README also includes a Chinese translation link for readers who prefer that language.

git clone https://github.com/krasimir/react-in-patterns

Know the topics and chapters before you start

The book is organised into three groups. Foundation covers component communication, event handlers, composition, controlled and uncontrolled inputs, and presentational and container components. Data flow covers one-direction data flow, Flux and Redux. MISC covers dependency injection, styling and third-party libraries, and separation of concerns.

Choose the chapters that match your problem. For example, read the Composition chapter if you are deciding between children, render props and higher-order components, and read the Flux and Redux chapters if you are comparing state management approaches.

  • Communication: input and output between components
  • Composition: children API, passing a child as a prop, higher-order components, function as children and render props
  • Flux and Redux: architecture, main characteristics, and a simple counter app using Redux
  • Dependency injection: React context and the module system
  • Styling: CSS classes, inline styling, CSS modules and styled-components

Build the book yourself (optional)

The README gives a build step for generating the book from the source. It uses yarn to install dependencies and then build the book.

To produce ebook files, the README says you need calibre and must link its ebook-convert tool so it is available on your command line. The README's example link is for macOS; check the calibre documentation for other systems.

yarn install && yarn build

What people use it for

  • Comparing Flux and Redux architectures before choosing a state approach for a project
  • Learning when to use higher-order components versus render props
  • Reviewing styling options such as CSS modules and styled-components
  • Reading offline on an e-reader using the Mobi or ePub file
  • Studying how presentational and container components are separated

Frequently asked questions

Is react-in-patterns free?

Yes, the README describes it as a free book. The repository is licensed under MIT, and the book is available in web, PDF, Mobi and ePub formats.

How do I install react-in-patterns?

You do not install it to read it. Open the web version or download a PDF, Mobi or ePub file from the README links. To get the code samples, run git clone https://github.com/krasimir/react-in-patterns.

What are the requirements for react-in-patterns?

The project lists no prerequisites. The book assumes you already know basic React and JavaScript, so it is not a beginner course. Building the ebook files additionally needs yarn and calibre.

Is react-in-patterns up to date with current React?

Not fully. The README references older React versions, including pre-16.3 context, and the last push was in January 2025. Check newer React documentation for current features.

What are alternatives to react-in-patterns?

The README lists react-bits, which covers React patterns, techniques, tips and tricks, and react-patterns from Planning Center Online. It also links Michael Chan's reactpatterns.com and the React design principles page.

Can I read react-in-patterns offline?

Yes. The README provides PDF, Mobi and ePub files that you can download and read without an internet connection.

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Our verdict

react-in-patterns suits developers who already know basic React and want a free, clear explanation of common structuring patterns and the trade-offs between Flux, Redux and context. Beginners and anyone who needs guidance on the latest React features should choose a newer resource, such as the README's linked alternatives or current React documentation.

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