Update README.md

peet86 · Oct 5, 2023 · 0c29202 · 0c29202
1 parent 95a5d6d
commit 0c29202
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/README.md b/README.md
@@ -121,8 +121,11 @@ By default returns with the total price:
 total()
 // 220
 ```
-or you can pass a custom reducer function to have full control over the calculation.
+or you can pass a custom reducer function to summarize other attributes, like product quantity:
 
+```javascript
+total((sum, product) => (sum += product.quantity), 0)
+```
 
 #### destroy()