ComputedObservable<T>

Defined in: src/lib/observable/observable.ts:346

Computed observable that derives its value from other observables. Read-only - value is computed from sources.

Type Parameters

Type Parameter	Description
T	The type of computed value

Implements

• ReadonlyObservable<T>
• IDisposable

Constructors

Constructor

new ComputedObservable\<T\>(
   id: string, 
   compute: () => T, 
sources: ReadonlyObservable<unknown>[]): ComputedObservable\<T\>;

Defined in: src/lib/observable/observable.ts:358

Create a computed observable.

Parameters

Parameter	Type	Description
id	string	Unique identifier
compute	() => T	Function that computes the value from sources
sources	ReadonlyObservable<unknown>[]	Source observables to watch

Returns

ComputedObservable<T>

Accessors

id

Get Signature

get id(): string;

Defined in: src/lib/observable/observable.ts:377

The unique identifier of this observable.

Returns

string

The unique identifier of this observable.

Implementation of

ReadonlyObservable.id

---

isDisposed

Get Signature

get isDisposed(): boolean;

Defined in: src/lib/observable/observable.ts:385

Returns

boolean

Implementation of

IDisposable.isDisposed

---

value

Get Signature

get value(): T;

Defined in: src/lib/observable/observable.ts:381

The current value.

Returns

T

The current value.

Implementation of

ReadonlyObservable.value

Methods

[dispose]()

dispose: void;

Defined in: src/lib/observable/observable.ts:418

Returns

void

Implementation of

IDisposable.[dispose]

---

dispose()

dispose(): void;

Defined in: src/lib/observable/observable.ts:408

Dispose of the computed observable and unsubscribe from sources.

Returns

void

Implementation of

IDisposable.dispose

---

pipe()

pipe\<U\>(source: ReadonlyObservable\<U\>, transform?: (value: U) => T): Subscription;

Defined in: src/lib/observable/observable.ts:393

Subscribe to another observable, updating this one when it changes. Creates a one-way binding from source to this observable.

Type Parameters

Type Parameter
U

Parameters

Parameter	Type	Description
source	ReadonlyObservable<U>	The source observable to subscribe to
transform?	(value: U) => T	Optional transform function

Returns

Subscription

Subscription that can be disposed to unsubscribe

Implementation of

ReadonlyObservable.pipe

---

subscribe()

subscribe(callback: SubscriptionCallback\<T\>): Subscription;

Defined in: src/lib/observable/observable.ts:389

Subscribe to value changes.

Parameters

Parameter	Type	Description
callback	SubscriptionCallback<T>	Function called when value changes

Returns

Subscription

Subscription that can be disposed to unsubscribe

Implementation of

ReadonlyObservable.subscribe