Class Computed

A computed signal that auto-tracks dependencies by intercepting .value reads during its compute function. Re-tracks on each recomputation, so dynamic/conditional dependencies work.

Hierarchy (View Summary)

Signal
- Computed

Index

Constructors

Accessors

Methods

equals recomputeIfDirty subscribe

Constructors

constructor

new Computed(fn: Function, options?: any): Computed
Parameters
- fn: Function
  Compute function. All Signal .value reads inside this function are auto-tracked as dependencies.
- Optionaloptions: any
  Forwarded to Signal (e.g. equals).
Returns Computed
Overrides Signal.constructor
- Defined in src/signals.js:122

Accessors

value

get value(): any
Returns any
Overrides Signal.value
- Defined in src/signals.js:127
set value(_v: any): void
Parameters
- _v: any
Returns void
Overrides Signal.value
- Defined in src/signals.js:137

Methods

equals

equals(a: any, b: any): boolean
Overridable equality check. Defaults to ===.
Parameters
- a: any
- b: any
Returns boolean
Inherited from Signal.equals
- Defined in src/signals.js:83

recomputeIfDirty

recomputeIfDirty(): void
Recompute if dirty. Called by the batch flush scheduler and also available for eager evaluation.

Returns void
- Defined in src/signals.js:145

subscribe(fn: Function): Function
Subscribe to value changes. Returns an unsubscribe function.
Parameters
- fn: Function
  Called with (newValue, oldValue) on change
Returns Function
Unsubscribe function
Inherited from Signal.subscribe
- Defined in src/signals.js:92