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Does not work in Next.js serverless (API route) #255

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2 of 4 tasks
antoinerousseau opened this issue Sep 9, 2024 · 1 comment · May be fixed by #256
Closed
2 of 4 tasks

Does not work in Next.js serverless (API route) #255

antoinerousseau opened this issue Sep 9, 2024 · 1 comment · May be fixed by #256
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bug Something isn't working nodejs web

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@antoinerousseau
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antoinerousseau commented Sep 9, 2024 •
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Bug description

SSR support was supported in #57), but as mentioned here, the web version gets loaded instead of the Node.js version, and it tries to access the window object, throwing a ReferenceError: window is not defined from here, here or here.

How to reproduce

  1. Create a Next.js app router API route
import { PostHog } from "posthog-js-lite"
export async function GET() {
  const posthog = new PostHog(...)
  posthog.capture(...)
}
  1. Call the API route from a component: you get a ReferenceError: window is not defined

Related sub-libraries

  • All of them
  • posthog-web
  • posthog-node
  • posthog-react-native

Additional context

Related: #67 (comment)
@antoinerousseau antoinerousseau added the bug Something isn't working label Sep 9, 2024
@marandaneto marandaneto mentioned this issue Sep 10, 2024
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@benjackwhite
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This lib really isn't designed for the use case in mind. Next-js router API is running server side and as such is basically a node-js environment and so should use the built posthog-node target instead as that way it includes concepts such as graceful shutdown and the correct fetch implementation for your node environment.

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fix: check if window is available before using on web env PostHog/posthog-js-lite
3 participants
@antoinerousseau @benjackwhite @marandaneto