Upgrading Next.js to version 15 (from 14)

Update Plan

My plan is to do what the dependabot email said and update next 14 to a later version of next 14. But, I was reading about Copilot for grins. I'm really not going to bond with AI I think, but what the heck. I know how to update next.js so let's see it work.

Copilot

In Copilot check, I just said update next.js. I think that was it! I don't think I said bump next.js to latest version of next.js 14 so instead of getting that, it updated me to the latest version.

Copilot Output:
npm install next@latest

It ran it by itself and I tested both dev and build scripts. Everything worked fine.

Brief Analysis

So, did it do a good job? It was obviously my fault for not specifying things and just clicking on buttons. But it works right?

If I search for how to upgrade next.js, the documentation says the minimum versions of react and react-dom are both 19. It didn't update either of these.

I suppose it is up to me, the human to do that.

npm install react@latest react-dom@latest

More testing

Does it work still? Does any of this matter with such a trivial example site? I wish it would have been smart enough to handle all those requirements. That's the thing that I still have a problem with regarding all these magical packages. When I run into blockages, it's often because I cannot seem to apply updates properly.

Both dev and build are still working locally. I'll assume all will work when I push these changes.

Conclusion

Close Copilot. If you would have updated react and react-dom as well as next I would have been impressed.

Close Ken. If you would have just said to not do a major update...somehow.