```javascript
WXAPI.shippingCartSelected(token, key, selected, type = '')
```
+ token current user login credentials
+ key is the key number recorded in the shopping cart. Please separate multiple keys with English commas.
+ type This parameter does not need to be passed. It is mainly used in business scenarios with multiple shopping carts. You can specify to delete records under a certain shopping cart type.
+ selected true means selected, false means unchecked