@protonapp/react-native-material-ui/src/styles/getPlatformElevation.ios.js

React Native Material Design Components

/* eslint-enable import/no-unresolved, import/extensions */
import { black, transparent } from './colors';
import { ELEVATION_ZINDEX } from './constants';

const getPlatformElevation = elevation => {
  if (elevation === 0) {
    return {
      shadowColor: transparent,
      zIndex: 0,
    };
  }

  return {
    shadowColor: black,
    shadowOpacity: 0.3,
    shadowRadius: elevation / 2,
    shadowOffset: {
      height: 1,
      width: 0,
    },
    // we need to have zIndex on iOS, otherwise the shadow is under components that
    // are rendered later
    zIndex: ELEVATION_ZINDEX,
  };
};

export default getPlatformElevation;