Reactive State

Definitions

1. Application state that is tracked by a reactivity system so that any UI component or computation reading it is automatically re-executed when the state changes. Frameworks implement this via proxies (Vue), signals (SolidJS, Angular), atoms (Jotai), or compiler-based tracking (Svelte's $state rune).

   In plain English: Data in an app that, when changed, automatically causes the parts of the screen that display it to refresh.

   Example: "When we made the cart total a reactive state signal, every component displaying the price updated instantly without manual subscriptions."

Related Terms

• Component Library
• Rendering
• Slot
• GUI
• Modal
• Mutation
• Render
• State Container
• Vuex
• Change Detection