I have a route like this on express

```
app.delete('/items/:id', function (req,res) {
...
})

```

When I try to send a delete request on:

<http://localhost/items/10> I delete the item successfully. 

However, if I try to send the delete to <http://localhost/items> I get Cannot DELETE /items

Why can't I access to app.delete when I don't specify the id?