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docs: iOS Hermes export USE_HERMES=true warning added. #4807

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docs: iOS Hermes export USE_HERMES=true warning added. #4807

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docs: iOS Hermes `export USE_HERMES=true` warning added.
zaferatli Sep 17, 2025
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Merge branch 'main' of https://github.com/zaferatli/react-native-webs…
zaferatli Sep 26, 2025
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2 changes: 2 additions & 0 deletions website/versioned_docs/version-0.81/hermes.md
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Expand Up @@ -83,6 +83,8 @@ yarn ios --mode Release
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Add `export USE_HERMES=true` to `/ios/.xcode.env` for [Hermes bytecoded](https://github.com/facebook/react-native/blob/4d2e38edd97a87e93cb95a8a0021abf73765cf28/packages/react-native/scripts/react-native-xcode.sh#L166C8-L166C18) bundle on iOS.
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Why are you adding this?

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Because on iOS side without this variable release builds is not rendered by hermes.

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Nope you should not be needing to add export USE_HERMES=true to your .xcode.env file. I think there is something going on in your setup.

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@zaferatli zaferatli Sep 22, 2025 •
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I think there is fuzzy situation, when I add hermes_enable value to Podfile I expected to release build would have been byte coded version as same as android without installing pods with USE_HERMES=1 which is not seems on documantation also.

I'm not quite sure but there is fuzy situation which is not explained on this type. We need to add this USE_HERMES=1 bundle exec pod install or mine idk

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Hermes is the default engine. If you don't specify anything, that would be used by default.

I think that your setup has some issue and that's not the base situation for all our users, so we should not add this into the documentation


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