react-native-fast-shadow/lib/module/utils.js

Fast and high quality Android shadows for React Native

import { Platform } from 'react-native';
/**
 * Utility function to ensure that shadows look the same accross all platforms (iOS, android, web).
 * Rationale: for some reasons, the shadow radius on iOS looks like too large by a factor of 2.
 * To keep shadows consistent, this function will divide the shadow radius by 2 on iOS.
 */
export function shadowStyle(_ref) {
  let {
    color,
    opacity,
    radius,
    offset
  } = _ref;
  return {
    shadowColor: color,
    shadowOpacity: opacity,
    shadowRadius: radius && Platform.select({
      ios: radius / 2,
      default: radius
    }),
    shadowOffset: offset && {
      width: offset[0],
      height: offset[1]
    }
  };
}
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