import { ThemeManager } from 'react-native-ui-lib'; // with plain object ThemeManager.setComponentTheme('Card', { borderRadius: 8, }); // with a dynamic function ThemeManager.setComponentTheme('Button', (props, context) => { // 'square' is not an original Button prop, but a custom prop that can // be used to create different variations of buttons in your app if (props.square) { return { borderRadius: 0, }; } }); ThemeManager.setComponentTheme('View', { backgroundColor: '#e9f6f7', });