Part 1

The first part is about the Dart 3 programming language. It has eight chapters:

Chapter 2 - Variables and types

Variables
Data types
Data type operators

Chapter 3 - Control flow and functions

control flow and loops
functions and assertions
type aliases

Chapter 4 - Classes

Constructors, getters and setters
Operators overload
Annotations and mirrors

Chapter 5 - Inheritance, core classes and exceptions

Inheritance
The Object class
Exceptions and errors

Chapter 6 - Generics and collections

Introduction
Collections
Good practices

Chapter 7 - Advanced language features

Class modifiers
Patterns
Exhaustiveness checking

Chapter 8 - Futures, Streams and Isolates

Futures
Streams
Isolates

Chapter 9 - API overview and tests

Dart core libraries
Testing Dart code
Good practices

Part 2

The second part is about the Flutter 3.10 framework. It has ten chapters:

Chapter 10 - Flutter, widgets and trees

Flutter overview
Widgets
Widget, Element and RenderObject trees

Chapter 11 - Material, Cupertino and CustomPaint

Basic widgets
Material and Cupertino library
Custom painters

Chapter 12 - State management

Using setState
Using InheritedWidget
State restoration

Chapter 13 - Routes and navigation

Imperative and declarative navigation
The go_router package
Deep linking and comparisons

Chapter 14 - Layouts and responsiveness

Layouts in Flutter
Building responsive layouts
Scrolling widgets and Slivers

Chapter 15 - Internationalization and accessibility

Internationalization
Accessibility
The intl package

Chapter 16 - Assets and images

Defining assets
Images in Flutter
Using custom fonts

Chapter 17 - Animations

Implicit animations
Explicit animations
Good practices

Chapter 18 - Forms and gestures

Form input widgets
Handling forms
Gestures

Chapter 19 - Testing Flutter applications

Widget testing
Golden tests
Integration tests

Part 3

The third part is about the Dart and Flutter ecosystems. It has four chapters:

Chapter 20 - Creating and maintaining a package

Package creation
Package maintenance
Publishing packages at pub.dev

Chapter 21 - Creating and maintaining a Flutter app

Flutter project creation
Maintaining a Flutter project
Creating release builds

Chapter 22 - HTTP servers and low-level HTML

Creating HTTP servers
The shelf package
HTML manipulation with dart:html

Chapter 23 - Platform interactions

Platform specific features
Creating plugin packages
Creating FFI plugin packages

Extra

There are some extra contents on the book.

Chapter 1 - Introduction

Dart introduction
Flutter introduction

Appendix

DevTools
Performance best practices