Nuxt session replay installation

Install the package

Required

Install the PostHog JavaScript library using your package manager:

npm install posthog-js
yarn add posthog-js
pnpm add posthog-js

Nuxt version

This guide is for Nuxt v3.0 and above. For Nuxt v2.16 and below, see our Nuxt docs.

Add environment variables

Required

Add your PostHog API key and host to your nuxt.config.js file:

nuxt.config.js
export default defineNuxtConfig({
  runtimeConfig: {
    public: {
      posthogPublicKey: '<ph_project_api_key>',
      posthogHost: 'https://us.i.posthog.com',
      posthogDefaults: '2025-11-30'
    }
  }
})

Create a plugin

Required

Create a new plugin by creating a new file posthog.client.js in your plugins directory:

plugins/posthog.client.js
import { defineNuxtPlugin } from '#app'
import posthog from 'posthog-js'

export default defineNuxtPlugin(nuxtApp => {
  const runtimeConfig = useRuntimeConfig();
  const posthogClient = posthog.init(runtimeConfig.public.posthogPublicKey, {
    api_host: runtimeConfig.public.posthogHost,
    defaults: runtimeConfig.public.posthogDefaults,
    loaded: (posthog) => {
      if (import.meta.env.MODE === 'development') posthog.debug();
    }
  })

  return {
    provide: {
      posthog: () => posthogClient
    }
  }
})

4
Watch session recordings
Recommended
Visit your site or app and interact with it for at least 10 seconds to generate a recording. Navigate between pages, click buttons, and fill out forms to capture meaningful interactions.
Watch your first recording →

Next steps

Recommended

Now that you're recording sessions, continue with the resources below to learn what else Session Replay enables within the PostHog platform.

Resource	Description
Watching recordings	How to find and watch session recordings
Privacy controls	How to mask sensitive data in recordings
Network recording	How to capture network requests in recordings
Console log recording	How to capture console logs in recordings
More tutorials	Other real-world examples and use cases

Nuxt session replay installation

Install the package

Add environment variables

Create a plugin

Watch session recordings

Next steps

Community questions

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