What is Vue reactivity and how does it work?

What is Vue reactivity and how does it work?

Vue reactivity is a system that allows Vue.js to automatically update the DOM when the underlying data changes. It uses a dependency tracking mechanism to observe changes in data and re-renders components efficiently.

Can you explain how Vue tracks changes in data?

Vue uses getters and setters to intercept data access and modification. When a component accesses a reactive property, Vue tracks it as a dependency. When the property changes, Vue knows which components to re-render.

What are the benefits of using Vue's reactivity system?

The benefits include automatic DOM updates, improved performance through efficient re-rendering, and a simpler development experience as you don't have to manually manage the UI state.

Are there any limitations to Vue reactivity?

Yes, some limitations include the inability to detect property addition or deletion on reactive objects and the need to use Vue.set() for adding new properties to ensure reactivity.