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131 lines
3.1 KiB
Markdown
131 lines
3.1 KiB
Markdown
---
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title: "Context"
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description: Nuxt Kit provides a set of utilities to help you work with context.
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links:
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- label: Source
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icon: i-simple-icons-github
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to: https://github.com/nuxt/nuxt/blob/main/packages/kit/src/context.ts
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size: xs
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---
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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.
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::note
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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](https://github.com/harlan-zw/nuxt-site-config) as an example of usage.
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::
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## `useNuxt`
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Get the Nuxt instance from the context. It will throw an error if Nuxt is not available.
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### Type
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```ts
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function useNuxt(): Nuxt
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interface Nuxt {
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options: NuxtOptions
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hooks: Hookable<NuxtHooks>
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hook: Nuxt['hooks']['hook']
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callHook: Nuxt['hooks']['callHook']
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addHooks: Nuxt['hooks']['addHooks']
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ready: () => Promise<void>
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close: () => Promise<void>
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server?: any
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vfs: Record<string, string>
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apps: Record<string, NuxtApp>
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}
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```
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### Examples
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::code-group
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```ts [setupTranspilation.ts]
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// https://github.com/Lexpeartha/nuxt-xstate/blob/main/src/parts/transpile.ts
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import { useNuxt } from '@nuxt/kit'
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export const setupTranspilation = () => {
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const nuxt = useNuxt()
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nuxt.options.build.transpile = nuxt.options.build.transpile || []
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if (nuxt.options.builder === '@nuxt/webpack-builder') {
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nuxt.options.build.transpile.push(
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'xstate',
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)
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}
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}
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```
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```ts [module.ts]
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import { useNuxt } from '@nuxt/kit'
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import { setupTranspilation } from './setupTranspilation'
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export default defineNuxtModule({
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setup() {
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setupTranspilation()
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}
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})
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```
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::
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## `tryUseNuxt`
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Get the Nuxt instance from the context. It will return `null` if Nuxt is not available.
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### Type
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```ts
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function tryUseNuxt(): Nuxt | null
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interface Nuxt {
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options: NuxtOptions
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hooks: Hookable<NuxtHooks>
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hook: Nuxt['hooks']['hook']
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callHook: Nuxt['hooks']['callHook']
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addHooks: Nuxt['hooks']['addHooks']
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ready: () => Promise<void>
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close: () => Promise<void>
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server?: any
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vfs: Record<string, string>
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apps: Record<string, NuxtApp>
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}
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```
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### Examples
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::code-group
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```ts [requireSiteConfig.ts]
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// https://github.com/harlan-zw/nuxt-site-config/blob/main/test/assertions.test.ts
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import { tryUseNuxt } from '@nuxt/kit'
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interface SiteConfig {
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title: string
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}
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export const requireSiteConfig = (): SiteConfig => {
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const nuxt = tryUseNuxt()
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if (!nuxt) {
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return { title: null }
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}
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return nuxt.options.siteConfig
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}
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```
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```ts [module.ts]
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import { useNuxt } from '@nuxt/kit'
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import { requireSiteConfig } from './requireSiteConfig'
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export default defineNuxtModule({
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setup(_, nuxt) {
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const config = requireSiteConfig()
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nuxt.options.app.head.title = config.title
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}
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})
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```
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::
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