SizedBox class

A box with a specified size.

When given a child, uses .apply() to merge width/height directly onto the child — no wrapper div. Without a child, renders an empty <div> for spacer usage.

Column(children: [
  h1([text('Title')]),
  SizedBox(height: 2.rem),
  p([text('Description')]),
])

Inheritance

• Object
• Component
• StatelessComponent
• SizedBox

Available extensions

• ComponentApplyExtension

Constructors

SizedBox({Unit? width, Unit? height, Component? child, Key? key})

const

SizedBox.expand({Component? child, Key? key})

Creates a box that will become as large as its parent allows.

const

SizedBox.shrink({Component? child, Key? key})

Creates a box that will become as small as possible.

const

Properties

child → Component?

final

hashCode → int

The hash code for this object.

no setter, inherited

height → Unit?

final

key → Key?

Controls how one component replaces another component in the tree.

final, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

width → Unit?

final

Methods

apply({String? id, String? classes, Styles? styles, Map<String, String>? attributes, Map<String, EventCallback>? events}) → Component

Available on Component, provided by the ComponentApplyExtension extension

build(BuildContext context) → Component

Describes the part of the user interface represented by this component.

override

createElement() → Element

Creates a StatelessElement to manage this component's location in the tree.

inherited

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

shouldRebuild(covariant Component newComponent) → bool

Implement this method to determine whether a rebuild can be skipped.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited