The properties are parameters

index.js

@@ -1,4 +1,4 @@
-const sortby = (properties) => (a, b) => {
+const sortby = (...properties) => (a, b) => {
   // 'base' treat accent as there base character
   const collator = new Intl.Collator('en', { numeric: true, sensitivity: 'base' })
 

lib/sortby.test.js

@@ -11,7 +11,7 @@ const data = [
 ]
 
 test('sort by name ascending', () => {
-  const result = data.sort(sortby(['name']))
+  const result = data.sort(sortby('name'))
 
   equal(result, [
     { age: 40, name: "Persone 1", new: true },
@@ -20,7 +20,7 @@ test('sort by name ascending', () => {
 })
 
 test('sort by age ascending', () => {
-  const result = data.sort(sortby(['age']))
+  const result = data.sort(sortby('age'))
 
   equal(result, [
     { age: 17, name: "Persone 2", new: false },
@@ -29,7 +29,7 @@ test('sort by age ascending', () => {
 })
 
 test('sort by age descending', () => {
-  const result = data.sort(sortby(['age', 'desc']))
+  const result = data.sort(sortby('age', 'desc'))
 
   equal(result, [
     { age: 40, name: "Persone 1", new: true },
@@ -38,7 +38,7 @@ test('sort by age descending', () => {
 })
 
 test('sort by new descending', () => {
-  const result = data.sort(sortby(['new', 'desc']))
+  const result = data.sort(sortby('new', 'desc'))
 
   equal(result, [
     { age: 40, name: "Persone 1", new: true },
@@ -49,7 +49,7 @@ test('sort by new descending', () => {
 test('sort with accent, should not change order', () => {
   const data = [{ name: 'è' }, { name: 'é' }, { name: 'e' }]
 
-  const result = data.sort(sortby(['name']))
+  const result = data.sort(sortby('name'))
 
   equal(result, [{ name: 'è' }, { name: 'é' }, { name: 'e' }])
 })

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "sortby",
-  "version": "1.0.0",
+  "version": "2.0.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "sortby",
-      "version": "1.0.0",
+      "version": "2.0.0",
       "license": "AGPL-3.0-or-later",
       "dependencies": {
         "metaltest": "git+https://git.tranche.ca/fmatte/metaltest"

package.json

@@ -1,7 +1,7 @@
 {
   "name": "sortby",
   "description": "Sort object by property name",
-  "version": "1.0.0",
+  "version": "2.0.0",
   "author": "Frédéric Matte <fmatte@gmail.com>",
   "license": "AGPL-3.0-or-later",
   "main": "index.js",