I'm trying to install Growthbook for nodejs and keep getting this error:

SyntaxError: Named export 'GrowthBook' not found. The requested module '@growthbook/growthbook' is a CommonJS module, which may not support all module.exports as named exports.

Im testing this in a barebones sveltekit/typescript project and just by importing growthbook it throws this error at build time. This is my import - copied from docs:

Import { GrowthBook } from “@growthbook/growthbook”

This is a barebones, fresh sveltekit app I'm testing on. Runs fine during dev but fails at build. Does anyone have any ideas here ?

what nodeJs version are you using?

Hey Graham, I'm using v18.3.0

ya, you found the other thread with that problem

Should I try to downgrade my nodejs version ?

that would work - we're working on a solution

Ok so it works on node 16 ?

yes

Just tried running build

vite build

on node

v16.9.1

and got the same error. Any ideas what to try next ?

let me check my node version

Sveltekit is a server side rendered app. Could I send the client the growthbook features and experiments from the server, or does the tracking callback need to be called on the client for Mixpanel tracking to work ?

It's an issue with Node's ESM support. That was enabled by default on version 18, but can be opted in for earlier Node versions, which is likely what you are doing. I think our SDK only works in Node when using CommonJS module resolution. We're working on a fix to support ESM with node

Ok so should I downgrade my nodejs to v16 and and add

type: module

in my package.json ?

are you using Typescript as well? We're still debugging the exact cause, but it might be a conflict with typescript and node versions. I'm not sure just downgrading node alone will fix it

Yea using I'm using typescript too. I tried downgrading to 16.9.1 and still the same error

If you are able to downgrade Typescript to 4.6 or earlier that might work

Ok I will test this out in the morning. Thank you for your help 💯

no, they are very similar