react-native-images-preview/lib/theme/Metrics.js

A React Native animated custom images preview component.

import { Dimensions, PixelRatio } from 'react-native';
let { width, height } = Dimensions.get('window');
if (width > height) {
    [width, height] = [height, width];
}
//Guideline sizes are based on standard ~5" screen mobile device
const guidelineBaseWidth = 375;
const guidelineBaseHeight = 812;
const horizontalScale = (size) => (width / guidelineBaseWidth) * size;
const verticalScale = (size) => (height / guidelineBaseHeight) * size;
const moderateScale = (size, factor = 0.5) => size + (horizontalScale(size) - size) * factor;
const { roundToNearestPixel } = PixelRatio;
export default {
    horizontalScale,
    verticalScale,
    moderateScale,
    width,
    height,
    roundToNearestPixel,
};
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