Interface: SignalComputed<T>

API / @xmachines/play-signals / SignalComputed

Defined in: packages/play-signals/src/types.ts:112

The computed signal. It evaluates late, and it memoizes the result

Signal.Computed tracks each dependency when it runs its callback. It memoizes the result, and it runs the callback again only after a dependency changes. It therefore tracks each dependency for you, and you manage no subscription.

Example

import { Signal } from "@xmachines/play-signals";

const count = new Signal.State(0);
const doubled = new Signal.Computed(() => count.get() * 2);

console.log(doubled.get()); // 0
count.set(5);
console.log(doubled.get()); // 10 (the signal computed it again)
console.log(doubled.get()); // 10 (from the memory, with no new computation)

Type Parameters

Type Parameter
T

Methods

get()

get(): T;

Defined in: packages/play-signals/src/types.ts:118

Reads the computed value. It computes the value again only after a dependency changed

Returns

T

The value from the current dependencies