(1.6.0) Array methods return undefined

[cwayfinder]

• Version: 1.6.0
• SIMPLE Reproduction:

draft.items.find(({ id }) => id === extraId);

• Expected behavior: return the item of the array if it exists
• Actual behavior: return undefined

[mweststrate]

Given that the above doesn't give any insight in what extraId is, or doesn't exclude that the bug is somewhere else (typo, etc etc), please create a small, runnable, reproduction in codesandbox or as PR with unit test on this repo. (Tip: use gitpod).

[lotz]

I just ran into an issue with Arrays had to downgrade to 1.5.0 to get around it. Not sure if it's quite the same as this, but using a forEach with draft state (a proxy) in an NGXS app would cause a stack overflow error. Attempting to access a single element of the draft state array by index would result in an undefined, so something is up with Arrays in 1.6.0.

I can hopefully put together a simple repro case this week.

(I just tried reproducing this in StackBlitz, but the state objects do not appear to be proxies when using the produce method, so I don't see the issue: https://stackblitz.com/edit/angular-esfjza)

[mweststrate]

@cwayfinder As shown in above commit, the find method works as expected. So please provide a reproduction or close this issue.

[lotz]

I should have mentioned in my comment, and it may be related to the original comment in this issue, but this only came up when building my entire app for production (ng build --prod). It did not happen in Dev mode.

[mweststrate]

@lotz that sounds like a different issue. If the problem persists please create a new issue including reproducible reproduction.

[lotz]

Thanks @mweststrate. Just opened #198 with repro steps and example code.

[mweststrate]

Closing for a lack of reproduction. #198 has been solved in the mean time, so upgrading to 1.7.2 might fix the issue, if the cause is related