Uncaught ReferenceError: __decorate is not defined

[macjohnny]

Environment
Provide the content of the package.json file in the project:

@nativescript/[email protected]

Describe the bug
When starting the newly created app, the error Uncaught ReferenceError: __decorate is not defined occurs in the browser and the app crashes.

To Reproduce

ng new -c=@nativescript/schematics dummy-nativescript --shared
cd dummy-nativescript
ng serve

Expected behavior
No error

Additional context
The solution is to remove the following lines from the tsconfig.json:

    "noEmitHelpers": true, 

(Credits: https://stackoverflow.com/a/64088843)

[rob4226]

I just had the same issue but I wasn't sure if the NativeScript mobile part of the shared app needs the "noEmitHelpers": true, so instead I put "noEmitHelpers": false, into the "tsconfig.app.json" file so it would only affect the typescript compiler options of the web browser portion of the project which also fixed this issue.

[steamwings]

For my newly created code-sharing Angular project, ng serve first gave me

ERROR in ./src/polyfills.ts
Module not found: Error: Can't resolve 'core-js/es7/reflect' in ...

which I resolved by editing polyfills.ts to have import 'core-js/es/reflect'; instead of import 'core-js/es7/reflect';. (Note: my package.json has "core-js": "^3.6.0",.)

After that change, I now got Uncaught ReferenceError: __decorate is not defined, which was resolved as discussed above. After both changes, the demo app ran as expected.

EDIT:
I opened #306 regarding the polyfills error. The better fix is actually to add the missing .browserslistrc file.