1 files changed, 13 insertions, 0 deletions
diff --git a/frontend/app/utils/scale.js b/frontend/app/utils/scale.js
new file mode 100644
index 0000000..f754d48
--- /dev/null
+++ b/frontend/app/utils/scale.js
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+import { Dimensions } from 'react-native';
+
+const { width, height } = Dimensions.get('window');
+
+// Guideline sizes are based on standard ~5" screen mobile device
+const guidelineBaseWidth = 350;
+const guidelineBaseHeight = 680;
+
+const scale = size => (width / guidelineBaseWidth) * size;
+const scaleVertical = size => (height / guidelineBaseHeight) * size;
+const scaleModerate = (size, factor = 0.5) => size + ((scale(size) - size) * factor);
+
+export { scale, scaleVertical, scaleModerate };