defineNuxtComponent

defineNuxtComponent() is a helper function for defining type safe Vue components using options API similar to defineComponent(). defineNuxtComponent() wrapper also adds support for asyncData and head component options.

Using <script setup lang="ts"> is the recommended way of declaring Vue components in Nuxt 3.

asyncData()

If you choose not to use setup() in your app, you can use the asyncData() method within your component definition:

pages/index.vue
<script lang="ts">export default defineNuxtComponent({  async asyncData() {    return {      data: {        greetings: 'hello world!'      }    }  },})</script>

If you choose not to use setup() in your app, you can use the head() method within your component definition:

pages/index.vue
<script lang="ts">export default defineNuxtComponent({  head(nuxtApp    return {      title: 'My site'    }  },})</script>