What are computed properties in Vue.js?

What are computed properties in Vue.js?

Computed properties in Vue.js are properties that are calculated based on other data properties. They are reactive and will update automatically when their dependencies change.

Can you give me an example of how to use computed properties?

Sure! If you have a data property called 'price' and you want to apply a tax, you can create a computed property like this: computed: { totalPrice() { return this.price * 1.2; } }.

How do computed properties differ from methods?

Computed properties are cached based on their dependencies, meaning they only re-evaluate when their dependencies change. Methods, on the other hand, run every time they are called.

When should I use computed properties instead of methods?

Use computed properties when you need to derive a value based on reactive data and want to optimize performance by caching the result.