White screen after adding this package

[smeijer]

I've tried this package before, and just thought; let's try it again!

Unfortunately after adding the package, the screen stay's blank with only two console errors.

Does the babel transform also affect existing js files? I have a working js/react project, and are simply adding this package to it. No other changes at all:

meteor add nathantreid:[email protected]
meteor npm install @babel/plugin-transform-typescript --save-dev
meteor npm install @babel/preset-typescript --save-dev

Uncaught Error: Cannot find module 'redux-saga/effects'
...
Uncaught TypeError: Cannot read property 'dispatch' of undefined

[akanix42]

It shouldn't have any effect on .js files as the plugin is only registered for .ts and .tsx files.
However, perhaps one of the npm packages contains .ts files which are now being transpiled and causing issues?
You can try adding a .tsignore file to your project root to exclude npm packages:

node_modules/

If you provide a reproduction repo I'll take a look.