Results for “Animations”

Reach for an implicit animation first: give AnimatedContainer, AnimatedOpacity or TweenAnimationBuilder a duration and a new target value, and the widget animates there

which allocates an offscreen buffer and is expensive on mobile GPUs. Fade with AnimatedOpacity/FadeTransition or a semi-transparent colour instead. RepaintBoundary isolates a subtree into its own layer

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

A widget is an immutable description of part of the UI. Flutter

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

nobody else needs it: a tab index, a text field's focus, an animation's progress. setState is the right tool and nothing more is needed