Introduction
Welcome to Flutter Internals, a community-maintained open source book providing a guided tour through Flutter's implementation.
This book is very much a "work in progress"; in fact, we'd love your help with grammatical fixes, technical edits, and new content.
Click here to become a contributor.

What is this book?

  • The goal of this book is to provide intuitive descriptions of Flutter’s internals in an easily digestible outline format.
  • Descriptions are intended to be comprehensive without becoming bogged down in implementation details or sacrificing clarity.
  • This book strives to provide a “hawk’s eye view” of Flutter’s implementation.

Who is the audience of this book?

  • These notes are most useful once you have a solid understanding of how to use Flutter (since they describe how the interfaces actually work).
  • This outline was written for developers looking to build intuition about Flutter internals and Flutter hackers looking to ramp up on the codebase.
  • We also hope that this book can inspire more thorough learning materials (such as deep dive videos or long form articles).

Who can contribute to this book?

  • Anyone (thank you)! If there’s a corner of the framework that you find confusing, please consider becoming a contributor and updating the book with the relevant details.
  • Please read the "Get Involved" section.
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What is this book?
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