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From
teropa
Managing the synchronization of app state and the user interface has long been a major source of complexity in UI development, and by now we have several different approaches to dealing with it. This article explores a few of them: Ember's data binding, Angular's dirty checking, React's virtual DOM, and its relationship to immutable data structures.
Where things start to get more challenging is when we start talking about data changing over time. This can happen when the user interacts with the UI, or when something else happens in the world that updates the data. The UI needs to reflect this change. Furthermore, because rebuilding DOM trees is expensive, we'd like to do as little work as possible to get that updated data on the screen.
