What is Vue.js reactivity and how does it work?

What is Vue.js reactivity and how does it work?

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

Can you explain how Vue's reactivity system differs from React's?

Sure! Vue uses a reactive data model with getters and setters, while React relies on a virtual DOM and state management. Vue's reactivity is more automatic, whereas React requires explicit state updates.

What are some common pitfalls when using Vue's reactivity?

Common pitfalls include mutating objects directly, not using Vue.set for adding new properties, and misunderstanding how reactivity works with arrays.

How can I optimize performance in a Vue.js application?

You can optimize performance by using computed properties, lazy loading components, and minimizing watchers. Also, consider using the Vue Devtools to identify performance bottlenecks.