Passing props into external stylesheet in React Na

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 code, and;
2. styles.js for the StyleSheet

Is there a way to pass props into the external StyleSheet?

Example: index.js:

render() {
  const iconColor = this.props.color || '#000';
  const iconSize = this.props.size || 25;

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

Example styles.js:

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

The code above does not work, but it's more there just to get the point across of what I'm trying to do. Any help is much appreciated!

Answer 1

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} />
 );

Answer 2

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')
}