Nuxt/docs/3.api/4.kit/6.context.md

title	description
Context	Nuxt Kit provides a set of utilities to help you work with context.

Context

source code

Nuxt modules allow you to enhance Nuxt's capabilities. They offer a structured way to keep your code organized and modular. If you're looking to break down your module into smaller components, Nuxt offers the useNuxt and tryUseNuxt functions. These functions enable you to conveniently access the Nuxt instance from the context without having to pass it as argument.

::alert{type=info} When you're working with the setup function in Nuxt modules, Nuxt is already provided as the second argument. This means you can directly utilize it without needing to call useNuxt(). You can look at Nuxt Site Config as an example of usage. ::

useNuxt

Get the Nuxt instance from the context. It will throw an error if Nuxt is not available.

Type

function useNuxt(): Nuxt

interface Nuxt {
  options: NuxtOptions
  hooks: Hookable<NuxtHooks>
  hook: Nuxt['hooks']['hook']
  callHook: Nuxt['hooks']['callHook']
  addHooks: Nuxt['hooks']['addHooks']
  ready: () => Promise<void>
  close: () => Promise<void>
  server?: any
  vfs: Record<string, string>
  apps: Record<string, NuxtApp>
}

Examples

::code-group

// https://github.com/Lexpeartha/nuxt-xstate/blob/main/src/parts/transpile.ts
import { useNuxt } from '@nuxt/kit'

export const setupTranspilation = () => {
  const nuxt = useNuxt()

  nuxt.options.build.transpile = nuxt.options.build.transpile || []

  if (nuxt.options.builder === '@nuxt/webpack-builder') {
    nuxt.options.build.transpile.push(
      'xstate',
    )
  }
}

import { useNuxt } from '@nuxt/kit'
import { setupTranspilation } from './setupTranspilation'

export default defineNuxtModule({
  setup() {
    setupTranspilation()
  }
})

::

tryUseNuxt

Get the Nuxt instance from the context. It will return null if Nuxt is not available.

Type

function tryUseNuxt(): Nuxt | null

interface Nuxt {
  options: NuxtOptions
  hooks: Hookable<NuxtHooks>
  hook: Nuxt['hooks']['hook']
  callHook: Nuxt['hooks']['callHook']
  addHooks: Nuxt['hooks']['addHooks']
  ready: () => Promise<void>
  close: () => Promise<void>
  server?: any
  vfs: Record<string, string>
  apps: Record<string, NuxtApp>
}

Examples

::code-group

// https://github.com/harlan-zw/nuxt-site-config/blob/main/test/assertions.test.ts
import { tryUseNuxt } from '@nuxt/kit'

interface SiteConfig {
  title: string
}

export const requireSiteConfig = (): SiteConfig => {
  const nuxt = tryUseNuxt()
  if (!nuxt) {
    return { title: null }
  }
  return nuxt.options.siteConfig
}

import { useNuxt } from '@nuxt/kit'
import { requireSiteConfig } from './requireSiteConfig'

export default defineNuxtModule({
  setup(_, nuxt) {
    const config = requireSiteConfig()
    nuxt.options.app.head.title = config.title
  }
})

::