✨ Added measurementDiffers method to utils

packages/utils/src/index.js

@@ -7,6 +7,8 @@ export default [
   'defaultSa',
   'formatImperial',
   'formatMm',
+  'measurementAsMm',
+  'measurementDiffers',
   'neckstimate',
   'optionDefault',
   'optionType',
@@ -17,7 +19,6 @@ export default [
   'smallestImperialStep',
   'storage',
   'tiler',
-  'measurementAsMm',
   'validateEmail',
   'validateTld'
 ]

packages/utils/src/measurementDiffers/index.js

@@ -0,0 +1,11 @@
+import neckstimate from '../neckstimate'
+
+// This returns how many sizes a measurement differs from the neckstimate value
+const measurementDiffers = (
+  neckCircumference,
+  measurementName,
+  measurementValue,
+  breasts = false
+) => Math.abs(Math.round((measurementValue - neckstimate(neckCircumference, measurementName)) / 20))
+
+export default measurementDiffers