Add support for using PH on the NextJS server side #3963
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ncarazon
requested changes
Dec 19, 2025
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| const distinctId = cookieValue | ||
| ? JSON.parse(cookieValue).distinct_id | ||
| : "anonymous"; | ||
|
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I believe this can crash a function in JSON.parse if the cookie value is malformed and it won't be caught then
| const cookieValue = cookieStore.get(cookieName)?.value; | ||
| const distinctId = cookieValue | ||
| ? JSON.parse(cookieValue).distinct_id | ||
| : "anonymous"; |
Contributor
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I believe that anonymous is not the best fallback here, as then If there’s no cookie, every user becomes "anonymous" and will all share the same flag evaluation. Maybe it's better to go with a user's id or sth similar
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Closing this for now. After further digging, it looks like in order to bootstrap PH init on the server side and correctly identify the user, we would need to migrate all the existing users to a new setup where IDs are created on the server side. |
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Adds support for using PH on the server side, following https://posthog.com/tutorials/nextjs-analytics