Cannot find module 'rxjs' or its corresponding type declarations, after switching to rxjs 7

Question

I'm facing this strange error after I have switched from rxjs 6.5 to rxjs 7. I'm not sure if it's a issue with the typings for rxjs 7 or if it's a issue with stackblitz (https://stackblitz.com/edit/rxjs-20-21-obs):

Islaen

Interesting. If I put in a package name of [email protected], then it seems to work. Not sure why. – Autograph

From Eric Simons (CEO of Stackblitz) on twitter: "We’re on it- upstream issue from Monaco not supporting latest version of typescript :( Should have a fix out either tomorrow or next week. Compilation / serving should still work tho!" – Autograph

@Autograph this explains also why the compilation works fine. I should follow Eric on twitter :) – Islaen

Answer 1

This should only happen while using stackblitz and not a real life project after rc.3

It is happening due to the recent changes and the major RXJS upgrade from version 6 to 7.

If you upgrade your Typescript version something greater than 4.2.x, you shouldn't face the issue in a real life project.

Right now it's still a pinned issue on github: https://github.com/ReactiveX/rxjs/issues/6350

I made a Q&A in this post as well because it effects the Angular framework as well: Cannot find module 'rxjs' or its corresponding type declarations.(2307) using stackblitz

Esthonia