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Flutter & Dart · Component

LayoutBuilder

LayoutBuilder builds widgets from the size constraints given by the parent. Its builder runs during layout, so the child can adapt to available space.

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Syntax

LayoutBuilder({Key? key, required Widget Function(BuildContext context, BoxConstraints constraints) builder})

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  • SliverLayoutBuilder
  • Builder
  • StatefulBuilder
  • CustomSingleChildLayout
  • SingleChildScrollView
  • OverflowBox
  • Align

Source: LayoutBuilder class - widgets library - Dart API. Checked 2026-11-03.