Results for “State”

widgets rebuild. Keep state that only one widget cares about in a StatefulWidget; lift state that several screens share above them, expose it through an InheritedWidget

objects; a new widget instance is cheap and is created on every build. StatelessWidget: build() depends only on its constructor arguments and BuildContext. StatefulWidget creates a State

text. FocusNode controls which field has the keyboard: create it once in State, pass it to the field, call requestFocus() to move focus, and dispose() it with

build), hand the Future to a FutureBuilder to show loading, error and data states, and move decoding of very large payloads onto a background isolate with compute

budget allows. Keep build() cheap and scoped (const widgets, small StatefulWidgets, lazy lists), avoid saveLayer-triggering effects such as Opacity and clipping in animations, and measure in profile

Reach for an implicit animation first: give AnimatedContainer, AnimatedOpacity or TweenAnimationBuilder a

Flutter builds a semantics tree next to the render tree and hands

A platform channel is a named, asynchronous message pipe between your Dart

Flutter has three test levels: unit tests (package:test) for plain Dart

Navigator keeps a stack of Route objects; Navigator.push adds a route built