arcgis-core-utilities

Reactive programming in ArcGIS JS apps is handled using Accessor patterns for watchable properties and reactiveUtils to compose reactive workflows that trigger real-time UI updates without blocking the main thread.

Running long computations off the main thread in ArcGIS Maps SDK is achieved using Workers, which move heavy background processing tasks away from the UI to maintain smooth interactive dashboard performance.

Abortable promises and debouncing for asynchronous ArcGIS workflows are managed using promiseUtils, providing robust sequencing and throttling to handle rapid user interactions and prevent conflicting requests.

You can observe array changes in ArcGIS widgets using the Collection utility, which provides observable arrays with change events and transformations to sync data layers with UI components reactively.

You do not need external dependencies to use these core ArcGIS utilities, as the package implements Accessor patterns, reactiveUtils, and Workers as modular components with clear internal dependencies and no external requirements.

Accessor patterns should be used for defining watchable properties and computed values, while reactiveUtils is used for watching state changes and composing reactive workflows that span multiple UI components and data layers.