Layout Widgets: Row, Column, Center

Common Built-in Widgets in Flutter

Stateless vs Stateful Widgets

Nesting Widgets to Build a UI

Parent and Child Widget Relationships

const Constructor for Widgets

child vs children

Center Takes a Single Child

setState in the Wrong Widget

Using BuildContext Correctly

StatefulWidget Needs createState

StatelessWidget build Signature

Updating UI with setState

Mounting the Root Widget

Defining a Custom Widget

Positional vs Named Constructor Args

Container color vs decoration

Nesting Widgets in the Tree

Scaffold appBar Type

The Widget Tree Structure

Everything Is a Widget

What a Widget Is in Flutter

Widgets Are Immutable UI Descriptions

Widget Properties and Constructor Arguments

Root Widget and runApp Entry Point

Parent and Child Widgets

child vs children

Common Built-in Widgets

Widgets Return Widgets

Root Widget of the App

Widget Immutability

Constructors and Properties

Widget Composition

Single-Child vs Multi-Child

Layout vs Content Widgets

Widget Rebuilding on Change

Root Widget of the Tree

Widgets Are Immutable

The child and children Properties

Passing Data via Constructors

Parent and Child Widgets

The Build Method