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lazy-widgets

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Typescript retained mode GUI for the HTML canvas API

github.com/rafern/lazy-widgets

rafern/lazy-widgets

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import type { Observable } from './Observable.js'; /** * A callback used for watching changes in a value of an {@link Observable}. * * @param group - The observable group that this change belongs to. Useful for selectively ignoring changes. `undefined` by default, which means that the change doesn't belong to any group and shouldn't be ignored. * @param source - The observable where this change originated from. This will be the last observable; if a value is transformed, the transformable observer will be the source, not the initial observable. * @category State Management */ export type ObservableCallback<V> = (source: Observable<V>, group: unknown) => void;