dark/light mode in react-native using nativewind

Question

I use nativewind(tailwind) in rect-native. I'm working on dark/light mode. I want to do it in the nicest possible way, clean code.
I want <Text className='text-white dark:text-black'> to be for example<Text className='text-textColor'> instead of this.

tailwind.config.js

module.exports = {
  content: ['./App.{js,jsx,ts,tsx}', './src/**/*.{js,jsx,ts,tsx}'],
  theme: {
    extend: {
      colors: {
        'primary': '#fffff',
      },
    },
  },
  plugins: [],
};

I have one possible solution that works but it is not the best possible solution.

const { colorScheme, toggleColorScheme } = useColorScheme();
  const colors = {
    text: colorScheme === 'dark' ? 'white' : 'black',
  };
  <Text className={`text-${colors.text}`}>

Answer 1

Firstly, you need to know that tailwind do not accept interpolation on class names. For example:

<Text className={`text-${colors.text}`}>

Here is how you can fix that.

---

Now, answering the question, according to the documentation you can use the dark: variant and it will be controlled by useColorScheme().

If you're using expo, you need to modify your app.json changing the userInterfaceStyle to automatic:

app.json

{
  "expo": {
    "userInterfaceStyle": "automatic"
  }
}

To manipulate theme's state, you could use a simple useState/Context API (not persisted) or AsyncStorage/MMKV/... (persisted state). After that, you can use dark: variant in that way:

import { Pressable, Text } from "react-native"
import { useColorScheme } from "nativewind";

function App() {
  const { colorScheme, toggleColorScheme } = useColorScheme();

  return (
    <Pressable
      className="flex-1 items-center justify-center bg-neutral-100 dark:bg-neutral-900"
      onPress={toggleColorScheme}>
      <Text className="text-black dark:text-white">
        {`Try clicking me! ${colorScheme === "dark" ? "🌙" : "🌞"}`}
      </Text>
    </Pressable>
  );
}

The base of this example was extracted from the documentation

I hope to help you.