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Flutter & Dart · Function

build

The build method describes a widget's user interface subtree. Flutter calls it when the widget is inserted or an inherited dependency changes, and it must return widgets without side effects.

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Syntax

Widget build(BuildContext context)

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  • StatelessWidget
  • StatefulWidget
  • BuildContext.dependOnInheritedWidgetOfExactType
  • Widget.canUpdate

Source: build method - Builder class - widgets library - Dart API. Checked 2026-11-03.