NuxtApp

In Nuxt 3, you can access runtime app context within composables, components and plugins. In Nuxt 2, this was referred to as Nuxt context.

Accessing NuxtApp

Within composables, plugins and components you can access nuxtApp with useNuxtApp:

function useMyComposable () {  const nuxtApp = useNuxtApp()  // access runtime nuxt app instance}

Plugins also receive nuxtApp as the first argument for convenience. Read more about plugins.

Providing Helpers

You can provide helpers to be usable across all composables and application. This usually happens within a Nuxt plugin.

const nuxtApp = useNuxtApp()nuxtApp.provide('hello', (name) => `Hello ${name}!`)console.log(nuxtApp.$hello('name')) // Prints "Hello name!"

In Nuxt 2 plugins, this was referred to as inject function.