Immer: Plugin not loaded for @xstate/immer

[FredyC]

🙋‍♂ Question

I am making it like a question because I don't have enough for reproduction. I am using @xstate/immer which is a fairly simple binding for XState. Today I started getting errors from the production like:

[Immer] minified error nr: 19 ES5. Find the full error at: https://bit.ly/3cXEKWf

Looking at the error list I see that "plugin not loaded", but I have no idea what that means. The binding doesn't seem to use any plugins.

Link to repro

Did not really manage to reproduce this locally and I have fairly extensive automated tests.

Environment

Even though @xstate/immer is configured with Immer V6, running yarn why immer in the project I am getting [email protected]. Could it be there isn't some breaking change handled properly?

_Sorry, if I am too vague. I am rather tired from launching product after 8-month work 💦_

[mweststrate]

It means that enableES5() needs to be called if you want to support Immer in browsers that don't support Proxy

[FredyC]

Right, that makes sense, should have realized that seeing ES5 in the message and it's coming from IE11. Are there any drawbacks to enabling it? As I understand from docs, it's just a fallback and it won't affect other users?

[mweststrate]

Correct, just a KB extra, which mostly matters for hypothetical discussions
so loved by programmers :P

On Fri, Oct 23, 2020 at 10:53 AM Daniel K. [e-mail] wrote:

Right, that makes sense, should have realized that seeing ES5 in the
message and it's coming from IE11. Are there any drawbacks to enabling it?
As I understand from docs, it's just a fallback and it won't affect other
users?

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[mweststrate]

Yeah, will unminify the exception in the next version, as this exception is
something that is more likely to escape the dev street

On Fri, Oct 23, 2020 at 11:21 AM Daniel K. [e-mail] wrote:

Closed #691 https://github.com/immerjs/immer/issues/691.

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