# \#sveltekit

**URL:** https://forum.devtalk.com/tag/sveltekit/1222.md

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## [Using GoTrue library in Sveltekit gives this error at build time: GoTrue is not a constructor](https://forum.devtalk.com/t/using-gotrue-library-in-sveltekit-gives-this-error-at-build-time-gotrue-is-not-a-constructor/18060)

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**Author:** [@ClaudiaGiv](https://forum.devtalk.com/u/ClaudiaGiv)\
**Replies:** 0\
**Last updated:** [19 August 2021 14:56 UTC](https://forum.devtalk.com/t/using-gotrue-library-in-sveltekit-gives-this-error-at-build-time-gotrue-is-not-a-constructor/18060 "2021-08-19T14:56:03Z")

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I have a sveltekit project that is using GoTrue library for authentication. In development mode (npm run dev) everything works but when I build for production (npm run build) it gives this error: GoTrue is not a constr…