Observable<T> class

A minimal observable value: holds a current value and notifies listeners on change via a broadcast stream. The web app's lightweight alternative to a state-management framework — screens subscribe and re-render their DOM subtree when the value changes.

Constructors

Observable(T initial)
Creates an observable seeded with initial.

Properties

hashCode → int
The hash code for this object.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
stream → Stream<T>
The change stream (broadcast; does not replay the current value).
no setter
value ↔ T
The current value.
getter/setter pair

Methods

dispose() → Future<void>
Releases the underlying stream controller.
listen(void listener(T value)) → StreamSubscription<T>
Subscribes listener, invoking it immediately with the current value and again on every change. Returns the subscription for cancellation.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
notify() → void
Forces a notification even when the value is unchanged (e.g. after an in-place mutation of a collection held by reference).
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited