Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial


React.js cdn link setup error

I followed along on the installation for setting up react using the cdn links but I get errors I checked the link it was the crossorigin but when I took it out the error went away but the cdn doesnt work how do I fix the problem

here is the link to the video I was referring to

1 Answer

Just lookup react cdn on the react docs these are the cdns to include in your html file. Also make sure you have the crossorigin Attribute.

React team also recommend to verify that the CDN you are using sets the

Access-Control-Allow-Origin: *

in the network tab in browser dev tools.

<!-- this should work -->
<script crossorigin src="https://unpkg.com/react@16/umd/react.development.js"></script>
<script crossorigin src="https://unpkg.com/react-dom@16/umd/react-dom.development.js"></script>