Show class

Conditional rendering sugar.

Mounts child when when returns true, or fallback when false.

DOM Representation

Mounts between sentinel comments <!-- bloom:show --> and <!-- /bloom:show -->.

final isLoggedIn = signal(false);

BloomNode authSection() => Show(
  () => isLoggedIn.value,
  child: Button(
    text: 'Log out',
    onClick: (e) => isLoggedIn.value = false,
  ),
  fallback: Button(
    text: 'Log in',
    onClick: (e) => isLoggedIn.value = true,
  ),
);

Inheritance

• Object
• BloomNode
• ShowNode
• Show

Constructors

Show(bool when(), {required BloomNode child, BloomNode? fallback})

Creates a conditional rendering boundary with predicate when, child, and optional fallback.

const

Properties

child → BloomNode

The descriptor tree rendered when when evaluates to true.

final, inherited

fallback → BloomNode?

Optional descriptor tree rendered when when evaluates to false.

final, inherited

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

when → bool Function()

Reactive predicate — called inside a signals effect (browser) or once (SSR).

final, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited