Passing props into external stylesheet in React Native?

Question

I\'m new to React and React Native. At the moment for each component I\'m breaking the code into 2 separate files:

1. index.js for all the React cod

Answer 1

Just wrap stylesheet in a function where you can optionally pass props.

Instead of:

const styles = StyleSheet.create({
  Title: { color: 'white' }
});

You do:

const styles = (props?: any) => StyleSheet.create({
  Title: { color: 'white' }
});

And now when you add them to your components, instead of

style={styles.Title}

You do:

style={styles(propsObjectHere).Title}

and since this is optional and you have no props to pass, just do:

style={styles().Title}

P.S. ignore the type if you, for some reason, are not using TypeScript :P

Answer 2

i'm sending noFooter boolean prop in a style sheet

   <View style={styles.mainFooterCont(noFooter)}>
     <Text> Testing </Text>
    </View>

and receiving it like

  mainFooterCont: noFooter => ({
   flexDirection: 'row',
   justifyContent: 'space-between',
   alignItems: 'flex-end',
   paddingBottom: noFooter ? 0 : 20,
   paddingTop: Metrics.ratio(noFooter ? 0 : 5),
   }),

Answer 3

Create a class that takes iconColor and iconSize as arguments and returns a StyleSheet object

// styles.js

export default class StyleSheetFactory {
    static getSheet(iconSize, iconColor) {
        return StyleSheet.create({
            icon : {
                color: iconColor,
                fontSize: iconSize
            }
        })
    }
}

// index.js

render() {
    let myStyleSheet = StyleSheetFactory.getSheet(64, 'red')
}

Answer 4

I rather to have my styles in a separate file styles.js. Inside styles.js:

export const styles = (props) => StyleSheet.create({
        icon : {
        color: props.iconColor,
        fontSize: props.iconSize
      }
    }

Inside your main class you can pass the value

return (
    <Icon style={styles(this.props).icon} />
  );

Alternatively you can those value directly so it would be

export const styles = (iconColor,iconSize) => StyleSheet.create({
    icon : {
    color: iconColor,
    fontSize: iconSize
  }
}

and inside your main class

return (
    <Icon style={styles(this.props,iconColor, 
this.props.iconSize).icon} />
 );