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Errors in IE11 when importing polyfills using es-abstract. #5615
Description
Is this a bug report?
Yes
If you import react-app-polyfill/ie11 before importing any shim/polyfill using es-abstract lib, you get an error in IE11 (possibly other browsers as well). Some example polyfills: object.entries, array-includes, object.values
Error: object doesn't support property or method Symbol(Symbol.iterator).9_<some-hash>
Location: es-abstract -> GetIntrinsic.js at line 56.
Workaround: import react-app-polyfill/ie11 after importing all shims/polyfills using es-abstract.
Environment
IE11, presumably anything IE.
Steps to Reproduce
- Create new app
- in index.js, on line 1,
import react-app-polyfill/ie11 - in index.js, on line 2,
import objectValues from 'object.values/polyfill' - Open your app in IE11.
Expected Behavior
App would run.
Actual Behavior
App crashes.
Reacted by Cristen Jones and Dan M.
Activity
JustinTRoss commentedon Oct 29, 2018
The equivalent was filed with
es-abstract: ljharb/es-abstract#39 .ljharb commentedon Oct 29, 2018
Seems like this might be the Symbol sham (since symbols can’t be fully polyfilled). If that’s the case, i can probably work around this in es-abstract, but a better solution would be not polyfilling Symbols at all.
Timer commentedon Oct 29, 2018
I wonder if core-js v3 behaves differently. Maybe try this: zloirock/core-js#419 (comment)?
x-ref zloirock/core-js#262
stale commentedon Nov 28, 2018
This issue has been automatically marked as stale because it has not had any recent activity. It will be closed in 5 days if no further activity occurs.
ljharb commentedon Nov 28, 2018
bump
thecristen commentedon Dec 3, 2018
I also have this issue thanks to
react-app-polyfill/ie11's Symbol polyfill making my app not work in IE 11.ChristianOlsson commentedon Dec 17, 2018
I am seeing the same issue. I have started using @babel/polyfill instead as a workaround.
Timer commentedon Dec 23, 2018
Not sure of the best path forward here.
ljharb commentedon Dec 23, 2018
I’ve been unable to reproduce this without CRA; see ljharb/es-abstract#39 (comment) - consistent repro steps with es-abstract and core-js in isolation should make it trivial to address.
devuxer commentedon Mar 3, 2019
I'm having a similar issue, except in my case, it's some weirdness involving
getOwnPropertyDescriptor.