juniorFlutter
What is Flutter and how does it work?
Updated Apr 28, 2026
Short answer
Flutter is a UI toolkit by Google for building natively compiled applications from a single codebase using the Dart language.
Deep explanation
Flutter works by using its own high-performance rendering engine (Skia or Impeller) to draw widgets directly to the screen, rather than using OEM (platform-specific) native widgets. This guarantees consistency across platforms. Dart compiles to native ARM/x86 code for mobile/desktop and JavaScript/WebAssembly for the web.
Real-world example
Building a unified mobile, web, and desktop app for an e-commerce store with pixel-perfect consistency.
Common mistakes
- Assuming Flutter wraps native iOS/Android UI components like React Native does (it draws its own UI).
Follow-up questions
- What is the Skia engine?
- What is Impeller?