# React Course: Uncaught ReferenceError: require is not defined

**URL:** <https://forum.freecodecamp.org/t/react-course-uncaught-referenceerror-require-is-not-defined/569059>\
**Category:** Curriculum Help\
**Created:** [November 5, 2022, 1:41pm UTC](https://forum.freecodecamp.org/t/react-course-uncaught-referenceerror-require-is-not-defined/569059 "2022-11-05T13:41:07Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![lasjorg](https://sea3.discourse-cdn.com/freecodecamp/user_avatar/forum.freecodecamp.org/lasjorg/32/280761_2.png) [@lasjorg](https://forum.freecodecamp.org/u/lasjorg)\
**Post date:** [November 7, 2022, 4:13pm UTC](https://forum.freecodecamp.org/t/react-course-uncaught-referenceerror-require-is-not-defined/569059/3 "2022-11-07T16:13:50Z")

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As far as I know, component import/export is not going to work with just the CDN link (without a build process). You will have to have all the components in index.js (or the HTML with a script element).

I would highly recommend you use [Vite](https://vitejs.dev/guide/#scaffolding-your-first-vite-project) and not CDN links. Or an online editor like StackBlitz or CodeSandbox.

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