Create one collator per run

index.js

@@ -1,32 +1,35 @@
-const sortby = (...properties) => (a, b) => {
+
+const sortby = (...properties) => {
   // 'base' treat accent as there base character
   const collator = new Intl.Collator('en', { numeric: true, sensitivity: 'base' })
 
   // if items is {prop1:value1, prop2:value2}
   // then sort(['prop1', 'desc', 'prop2'])
   // will sort by prop1 desc and prop2
-  for (let i = 0; i < properties.length; i++) {
-    const property = properties[i]
+  return (a, b) => {
+    for (let i = 0; i < properties.length; i++) {
+      const property = properties[i]
 
-    let order = -1
-    if (i + 1 < properties.length) {
-      const next = properties[i + 1]
+      let order = -1
+      if (i + 1 < properties.length) {
+        const next = properties[i + 1]
 
-      if (next === 'desc') {
-        order = 1
-        i++
-      } else if (next === 'asc') {
-        i++
+        if (next === 'desc') {
+          order = 1
+          i++
+        } else if (next === 'asc') {
+          i++
+        }
       }
+
+      const compare = collator.compare(a[property], b[property])
+      if (compare < 0) return order
+      if (compare > 0) return -order
+
     }
 
-    const compare = collator.compare(a[property], b[property])
-    if (compare < 0) return order
-    if (compare > 0) return -order
-
+    return 0
   }
-
-  return 0
 }
 
 export { sortby }