What is the setup function in Vue 3?

What is the setup function in Vue 3?

The setup function is a new feature in Vue 3 that allows you to organize your component's logic more effectively. It runs before the component is created and is where you can declare reactive state, computed properties, and methods.

How do I use the setup function to create reactive data?

You can use the ref or reactive APIs to create reactive data inside the setup function. For example, you can declare a reactive variable like this: const count = ref(0);.

Can I use props inside the setup function?

Yes, you can access props inside the setup function by declaring them as parameters. For example: setup(props) { ... }.

What are some common use cases for the setup function?

Common use cases include managing state, handling lifecycle hooks, and organizing logic for better readability and maintainability.