Angular 4 error with angular core change detection differs after upgrade from 2

Question

I have a ng2 website I upgraded to ng4. On building, I get an error

ERROR in /home/docker/urlmgr-client/node_modules/@angular/core/src/change_detection/differs/iterable_differs.d.ts

(15,48): error TS2304: Cannot find name 'Iterable'.

It is the only error and I never got this error in ng2.

I'm not sure where to begin debugging this. Any help would be appreciated.

Looks like a dependency error to me. With npm-check-updates you can easily check and update your dependencies after upgrading from Angular 2. — Ploppy
– Ploppy, Commented Apr 5, 2017 at 22:24
How is it a dependency error if it is in angular core? The offending line in the file is" export declare type NgIterable<T> = Array<T> | Iterable<T>;" — DFBerry
– DFBerry, Commented Apr 5, 2017 at 22:28
I added the following to the top of the file and it compiles now- "declare type Iterable<T> = any;" — DFBerry
– DFBerry, Commented Apr 5, 2017 at 22:46

Steverob2k · Accepted Answer · 2017-04-26 12:32:15Z

1

I had the same issue, it is due to having a file left over from Angular 2. You will need to delete the node_modules folder and reinstall Angular.

Adding "export declare type NgIterable = Array | Iterable" is completely unnecessary.

answered Apr 26, 2017 at 12:32

Steverob2k

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2 Comments

DFBerry Over a year ago

Thanks for letting me know. I will give it a try.

BinaryPatrick Over a year ago

Thank you so much; this saved me. I was in a panic as I'm not that familiar with all the crap angular loads in that folder. Whew, and upvoted. Should definitely be marked as the answer.

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