Nuxt/docs/2.guide/3.going-further/2.hooks.md

title	description
Lifecycle Hooks	Nuxt provides a powerful hooking system to expand almost every aspect using hooks.

::callout The hooking system is powered by unjs/hookable. ::

Nuxt Hooks (Build Time)

These hooks are available for Nuxt Modules and build context.

Within nuxt.config

export default defineNuxtConfig({
  hooks: {
    close: () => { }
  }
})

Within Nuxt Modules

import { defineNuxtModule } from '@nuxt/kit'

export default defineNuxtModule({
  setup (options, nuxt) {
    nuxt.hook('close', async () => { })
  }
})

::read-more{to="/docs/api/advanced/hooks#nuxt-hooks-build-time"} Explore all available Nuxt hooks. ::

App Hooks (Runtime)

App hooks can be mainly used by Nuxt Plugins to hook into rendering lifecycle but could also be used in Vue composables.

export default defineNuxtPlugin((nuxtApp) => {
  nuxtApp.hook('page:start', () => {
    /* your code goes here */
  })
})

::read-more{to="/docs/api/advanced/hooks#app-hooks-runtime"} Explore all available App hooks. ::

Server Hooks (Runtime)

These hooks are available for server plugins to hook into Nitro's runtime behavior.

export default defineNitroPlugin((nitroApp) => {
  nitroApp.hooks.hook('render:html', (html, { event }) => {
    console.log('render:html', html)
    html.bodyAppend.push('<hr>Appended by custom plugin')
  })

  nitroApp.hooks.hook('render:response', (response, { event }) => {
    console.log('render:response', response)
  })
})

::read-more{to="/docs/api/advanced/hooks#nitro-app-hooks-runtime-server-side"} Learn more about available Nitro lifecycle hooks. ::

Additional Hooks

You can add additional hooks by augmenting the types provided by Nuxt. This can be useful for modules.

import { HookResult } from "@nuxt/schema";

declare module '#app' {
  interface RuntimeNuxtHooks {
    'your-nuxt-runtime-hook': () => HookResult
  }
  interface NuxtHooks {
    'your-nuxt-hook': () => HookResult
  }
}

declare module 'nitropack' {
  interface NitroRuntimeHooks {
    'your-nitro-hook': () => void;
  }
}