What is the Vue 3 setup function?

What is the Vue 3 setup function?

The setup function in Vue 3 is a new way to organize component logic. It runs before the component is created and allows you to use reactive properties and lifecycle hooks.

How do I use the setup function in a component?

You can define the setup function within your component's options. Inside it, you can return reactive data and methods that can be used in the template.

Can you give me an example of using the setup function?

Sure! Here's a simple example:

import { ref } from 'vue';

export default {
  setup() {
    const count = ref(0);
    const increment = () => count.value++;
    return { count, increment };
  }
};

This creates a reactive count variable and an increment method.

What are the benefits of using the setup function?

The setup function promotes better organization of code, improves reusability, and allows for better TypeScript support.