refresh div after sending data to db - php

Question

i have a div that shows the total sum of some products:
<div class="total-price"><?php echo (!empty($cart)) ? $cart['total'] : '0'; ?> $</div>
with ajax, i'm adding products to cart ... se the page is not reloading.
How to refresh the div after I add the product to cart?
The ajax that i'm using:
<script>
$('#order-to-cart').submit(function (e) {
e.preventDefault();
$.ajax({
type: 'post',
url: '/tdt/order',
data: $(this).serialize(),
success: function () {
$(".success-message").slideDown().delay(5000).slideUp();
$(".total-price").something...;
}
});
})
</script>
Thank you!

Answer 1

You can do something like this:
<script>
$('#order-to-cart').submit(function (e) {
e.preventDefault();
$.ajax({
type: 'post',
url: '/tdt/order',
data: $(this).serialize(),
success: function () {
$(".success-message").slideDown().delay(5000).slideUp();
var oldPrice = $('.total-price').text() * 1;
var itemPrice = "15"; //the price that should be added
$('.total-price').text(oldPrice + itemPrice);
}
});
})
</script>

Answer 2

You should be returning a total basket value from your /tdt/order path.
In the PHP script you should echo some JSON data with all the required information, for example
echo json_encode(array("totalPrice" => "£10.01"));
Then you need to parse this information into your Javascript and update the pages elements;
<script>
$('#order-to-cart').submit(function (e) {
e.preventDefault();
$.ajax({
type: 'post',
url: '/tdt/order',
dataType: 'json',
data: $(this).serialize(),
success: function (data) {
$(".success-message").slideDown().delay(5000).slideUp();
$('.total-price').val(data.totalPrice);
}
});
})
</script>
The above ajax request will expect the data returned to be JSON, you will then use this to update the total-price element.

Answer 3

You can use something like angularjs or knockoutjs - for angular you would update your model - for knockout you would use the self.object.push(value) i.e.,
function OrderViewModel() {
var self = this;
self.myOrder = ko.observableArray([]);
self.addOrderItem = function () {
$.ajax({
type: "post",
url: "yourURL",
data: $("#YOURFORMFIELDID").serialize(),
dataType: "json",
success: function (value) {
self.myOrder.push(value);
},
headers: {
'RequestVerificationToken': '#TokenHeaderValue()'
}
});
}
}
ko.applyBindings(new orderViewModel());
</script>
</pre>