What's wrong with saving?

Question

JavaScript

Good afternoon.
I save to the database (in mongo)

function addProducts(name) {
            var data = {
                name: name
            };
            return $http.post('/products/add', data)
                    .then(addProductsComplete)
                    .catch(addProductsFailed);
            function addProductsComplete(response) {
                console.log('Сохранено');                
                return response.data;
            }
            function addProductsFailed(error) {
                console.log('error in POST Products service ');
            }
        }

In the server route, respectively

router.post('/add', function (req, res) {
    var product = new Products({
        name: req.body.name
    });
    product.save(function (err) {
        if (err)
            throw err;
    });

});

And everything is fine - the database is saved after the fact. But after a while, an error appears in the browser console
error in POST Products service
i.e. still getting an error. Delivered console.log('Сохранено');but it is not caused.
How to catch an error or what is wrong? Taking into account the fact that the database is still saved as it should.

Answer 1

So you don’t send a response, add res.sendStatus(200)
Otherwise, it gives you an error by timeout

Answer 2

Print the error to the console.

post('/products/add' respectively post('/add'

Why is it appropriate? Urls are different.