There's a problem reported in the react native webview regarding dark mode. It says that on iOS, the WebView automatically switches to dark theme when the system appearance is set to dark, but this does not happen on Android. There's also a PR created for this issue, although it hasn't been merged yet. I'm wondering how to enable dark mode in iOS webviews as mentioned. It doesn't switch automatically when changing the system-wide theme.
Is there something I'm overlooking here?
To resolve the styling issue, update the parent of AppTheme from Light to DayNight in the main/res/values/styles.xml file.
The styling for your app is managed through XML files located in the main/res/values folder. These files are automatically created by React Native or Expo, with the central file being styles.xml.
Within this file, there is an element named AppTheme:
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<item name="android:textColor">@android:color/black</item>
<item name="android:editTextStyle">@style/ResetEditText</item>
<item name="android:editTextBackground">@drawable/rn_edit_text_material</item>
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
</style>
By default, the parent property of AppTheme is set to a Light theme. Changing it to DayNight resolved the issue:
<style name="AppTheme" parent="Theme.AppCompat.DayNight.NoActionBar">
<item name="android:textColor">@android:color/black</item>
<item name="android:editTextStyle">@style/ResetEditText</item>
<item name="android:editTextBackground">@drawable/rn_edit_text_material</item>
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
</style>
I discovered this solution by referencing a similar example on GitHub. For more information on the DayNight parent theme, check out Google's documentation.
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