How do I use computed properties in Vue 3?

How do I use computed properties in Vue 3?

Computed properties in Vue 3 are used to define properties that depend on other data properties. They are reactive and will automatically update when their dependencies change.

Can you give me an example of a computed property?

Sure! If you have a data property called firstName and another called lastName, you can create a computed property called fullName that combines them like this: fullName() { return this.firstName + ' ' + this.lastName; }.

How do I use computed properties in templates?

You can use computed properties in your templates just like any other data property. For example, you can display {{ fullName }} in your template to show the full name.

Are computed properties cached?

Yes, computed properties are cached based on their dependencies. They will only re-evaluate when one of their dependencies changes, which makes them efficient.