mergeInto show console warning about pure object

[vreality64]

• Review the documentation: https://facebook.github.io/react-native
• Search for existing issues: https://github.com/facebook/react-native/issues
• Use the latest React Native release: https://github.com/facebook/react-native/releases

Environment

Run react-native info in your terminal and paste its contents here.

Description

code in mergeInto has potential error about Object created by Object.create(null). they does not have Object.prototype chain, so two.hasOwnProperty shows following error.

I'm facing this issue with react-native-extended-stylesheet and FlatList. FlatList has two style property (style, contentContainerStyle). I think these two styles are merged into one by mergeInto.

Environment

[skip envinfo]. The code was written 4 years ago, so I think it's affected on all RN environments.

Reproducible Demo

Sorry, doesn't have demo.

Suggestions

two.hasOwnProperty(key) should be Object.prototype.hasOwnProperty.call(two, key). this makes all thing works well. 😃

[react-native-bot]

Can you run react-native info and edit your issue to include these results under the Environment section?

If you believe this information is irrelevant to the reported issue, you may write [skip envinfo] under Environment to let us know.

[react-native-bot]

I am closing this issue because it does not contain the necessary environment info, and there has been no followup in a while.

If you found this thread after encountering the same issue in the latest release, please feel free to create a new issue with up-to-date information by clicking here.