SignalNode<T> class

Low-level reactive node that stores a mutable value.

This is the graph node behind Signal. It tracks subscribers, participates in batching, and propagates updates when set or notify runs.

Prefer Signal in application code; use SignalNode when implementing custom primitives on the core graph.

Example:

final node = SignalNode<int>(0);
final effect = Effect(() => print(node.get()));
node.set(1);
effect.dispose();
node.dispose();

Inheritance

Constructors

SignalNode(T? value, {JoltDebugOption? debug}): Creates a signal node initialized to value.

deps ↔ Link?: First dependency link in the chain.
getter/setter pairinherited
depsTail ↔ Link?: Last dependency link in the chain.
getter/setter pairinherited
flags ↔ int: Reactive flags for this node.
getter/setter pairinherited
hashCode → int: The hash code for this object.
no setterinherited
isDisposed → bool: Whether dispose has been called on this node.
no setter
pendingValue ↔ T?: The value that will be committed on the next get or update.
getter/setter pair
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
subs ↔ Link?: First subscriber link in the chain.
getter/setter pairinherited
subsTail ↔ Link?: Last subscriber link in the chain.
getter/setter pairinherited
value ↔ T?: The last value committed by get or update.
getter/setter pair

dispose() → void: Disposes this node and removes it from the dependency graph.
get() → T: Returns the current value and links this node to the active subscriber.
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
notify() → void: Forces subscribers to update without changing pendingValue.
peek() → T: Returns pendingValue without establishing a reactive dependency.
set(T value) → T: Stores value, marks the node dirty when it changes, and propagates.
toString() → String: A string representation of this object.
inherited
unwatched() → void: Called when this node loses its last subscriber.
override
update() → bool: Commits pendingValue as the current value.
override