How does Vue.js implement reactivity?

How does Vue.js implement reactivity?

Vue.js uses a reactivity system based on getters and setters to track changes in data. When data changes, Vue automatically updates the DOM.

Can you explain how the getter and setter work in this context?

Sure! Vue uses Object.defineProperty to define getters and setters for each property in the data object. This allows Vue to intercept changes and trigger updates.

What happens if I add a new property to an existing object?

If you add a new property directly, Vue won't be able to track it. Instead, you should use Vue.set or the reactive API in Vue 3 to ensure reactivity.

Is there a performance impact with this reactivity system?

Yes, there can be performance implications, especially with large data sets. Vue optimizes updates, but it's important to manage reactivity carefully.