toRem: Bypasses value transformations for string type values

src/utils/toRem.js

@@ -1,3 +1,12 @@
-export default function toRem(num) {
-  return num && `${num}rem`
+/**
+ * @param {Number|String|null} value
+ */
+export default function toRem(value) {
+  if (!value) {
+    return
+  }
+
+  const suffix = Number.isInteger(value) ? 'rem' : ''
+
+  return `${value}${suffix}`
 }

src/utils/toRem.test.js

@@ -1,6 +1,10 @@
 import { expect } from 'chai'
 import toRem from './toRem'
 
-test('converts to rem value properly', () => {
+test('Suffixes numeric values with "rem" string', () => {
   expect(toRem(5)).to.equal('5rem')
 })
+
+test('Returns string values as is', () => {
+  expect(toRem('2vh')).to.equal('2vh')
+})