react-native-web/docs/apis/StyleSheet.md

StyleSheet

The StyleSheet abstraction converts predefined styles to (vendor-prefixed) CSS without requiring a compile-time step. Some styles cannot be resolved outside of the render loop and are applied as inline styles. Read more about to how style your application.

Methods

create(obj: {[key: string]: any})

Each key of the object passed to create must define a style object.

Example

const styles = StyleSheet.create({
  container: {
    borderRadius: 4,
    borderWidth: 0.5,
    borderColor: '#d6d7da',
  },
  title: {
    fontSize: 19,
    fontWeight: 'bold',
  },
  activeTitle: {
    color: 'red',
  }
})

Use styles:

<View style={styles.container}>
  <Text
    style={[
      styles.title,
      this.props.isActive && styles.activeTitle
    ]}
  />
</View>

Or:

<View style={styles.container}>
  <Text
    style={{
      ...styles.title,
      ...(this.props.isActive && styles.activeTitle)
    }}
  />
</View>