Flutter Dart 3 Complete Guide — Pattern Matching, Sealed Classes & Records

Flutter × Dart 3 Complete Guide — Pattern Matching, Sealed Classes & Records Dart 3 introduced Pattern Matching, Sealed Classes, and Records — features that fundamentally change how you write Flutter apps. More expressive, safer code with less boilerplate. Dart 3 Key Features Patterns — Destructure and match values Sealed Classes — Exhaustive type checking Records — Lightweight anonymous types Class Modifiers ( final , interface , base , mixin ) Records — Lightweight Composite Types Return m