[question] does ARRAY_ERROR and FORM_ERROR have to be Symbols?

[Andarist]

This is causing me some serious headache when dealing with non es6+ browsers (ie11 😭) and I'm wondering what's the use case for those? Couldnt they easily be replaced with non-symbols?

[erikras]

The idea, and I think this is mostly the whole point of symbols, is to avoid namespace collision. They could be a string, but that would make a field name invalid.

Are polyfills not sufficient to alleviate your suffering?

[Andarist]

The idea, and I think this is mostly the whole point of symbols, is to avoid namespace collision. They could be a string, but that would make a field name invalid.

Many libraries use some distinct strings for it - in fact context names in legacy context API even couldnt be symbols so strings were enforce. I understand it's not ideal, because name clash is possible, but I think smth like @@final-form/ARRAY_ERROR would be "good enough" and universal.

My use case is pretty niche, but we distribute an installable widget and parts of its code is executed on our customers' website where I cannot just install global polyfill because it might cause numerous unexpected results for them so we avoid it at all costs.

Also this polyfill costs 3kb~ (from what i remember, ive checked it yesterday) which could be avoided.

I understand though that u might not want to migrate off this, as community we probably should start to support more and more es6+ by default, unfortunately on a global market we cannot ship it by default, because our customers expect it to work in IE11, some sandboxed windows "smart clients" (which use IE11 engine under the hood) etc - so overally im torn between wanting to support them and also wanting to finally use newer stuff.

Also I've finally debugged my issue to the core and at least I know what happened - after I have polyfilled Symbols (because final-form required this) I've ended up with other issue in redux because of that. If you are interested (quick read) you might see my redux PR (with explanation what happened) here.

[erikras]

Okay. You've convinced me. 👍

[Andarist]

Thanks! 😍

[erikras]

Published fix in v4.5.1.

[lock]

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