javascript works on localhost but fails on hosting server

Question

When i click on add-to-basket button i see an error which appears in my browser console saying :

Here is my basket.js file :

$(document).ready(function() {
    
    
    initBinds();
    

    function initBinds() {
        if ($('.remove_basket').length > 0) {
            $('.remove_basket').bind('click', removeFromBasket);
        }
        if ($('.update_basket').length > 0) {
            $('.update_basket').bind('click', updateBasket);
        }
        if ($('.fld_qty').length > 0) {
            $('.fld_qty').bind('keypress', function(e) {
                var code = e.keyCode ? e.keyCode : e.which;
                if (code == 13) {
                    updateBasket();
                }
            });
        }
    }

    
    function removeFromBasket() {
        var item = $(this).attr('rel');
        $.ajax({
            type: 'POST',
            url: '/home/u919084925/public_html/mod/basket_remove.php',
            dataType: 'html',
            data: ({ id: item }),
            success: function() {
                refreshBigBasket();
                refreshSmallBasket();
            },
            error: function() {
                alert('An error has occurred');
            }
        });
    }
    
    function refreshSmallBasket() {
    
        $.ajax({
            url: '/home/u919084925/public_html/mod/basket_small_refresh.php',
            dataType: 'json',
            success: function(data) {
                $.each(data, function(k, v) {
                    $("#basket_left ." + k + " span").text(v);
                });
            },
            error: function(data) {
                alert("An error has occurred");
            }
        });
    
    }

    function refreshBigBasket() {
        $.ajax({
            url: '/home/u919084925/public_html/mod/basket_view.php',
            dataType: 'html',
            success: function(data) {
                $('#big_basket').html(data);
                initBinds();
            },
            error: function(data) {
                alert('An error has occurred');
            }
        }); 
    }
    

    if ($(".add_to_basket").length > 0) {
        $(".add_to_basket").click(function() {
            
            var trigger = $(this);
            var param = trigger.attr("rel");
            var item = param.split("_");
            
            $.ajax({
                type: 'POST',
                url: '/home/u919084925/public_html/mod/basket.php',
                dataType: 'json',
                data: ({ id : item[0], job : item[1] }),
                success: function(data) {
                    var new_id = item[0] + '_' + data.job;
                    if (data.job != item[1]) {
                        if (data.job == 0) {
                            trigger.attr("rel", new_id);
                            trigger.text("Remove from basket");
                            trigger.addClass("red");
                        } else {
                            trigger.attr("rel", new_id);
                            trigger.text("Add to basket");
                            trigger.removeClass("red");
                        }
                        refreshSmallBasket();
                    }
                },
                error: function(data) {
                    alert("An error has occurred");
                }
            });
            return false;
            
        });
    }
    
    function updateBasket() {
        $('#frm_basket :input').each(function() {
            var sid = $(this).attr('id').split('-');
            var val = $(this).val();
            $.ajax({
                type: 'POST',
                url: '/home/u919084925/public_html/mod/basket_qty.php',
                data: ({ id: sid[1], qty: val }),
                success: function() {
                    refreshSmallBasket();
                    refreshBigBasket();
                },
                error: function() {
                    alert('An error has occurred');
                }
            });
        });
    }
    
    // proceed to paypal
    if ($('.paypal').length > 0) {
        $('.paypal').click(function() {
            
            var token = $(this).attr('id');
            var image = "<div style=\"text-align:center\">";
            image = image + "<img src=\"/images/loadinfo.net.gif\"";
            image = image + " alt=\"Proceeding to PayPal\" />";
            image = image + "<br />Please wait while we are redirecting you to PayPal...";
            image = image + "</div><div id=\"frm_pp\"></div>";
            
            $('#big_basket').fadeOut(200, function() {
                $(this).html(image).fadeIn(200, function() {
                    send2PP(token);
                });
            });
            
        });
    }
    
    function send2PP(token) {
        $.ajax({
            type: 'POST',
            url: '/mod/paypal.php',
            data: ({ token : token }),
            dataType: 'html',
            success: function(data) {
                $('#frm_pp').html(data);
                // submit form automatically
                $('#frm_paypal').submit();
            },
            error: function() {
                alert('An error has occurred');
            }       
        });
        
});

I tried to resolve it but couldn't find a proper solution. Help me with this, I cannot understand the cause of this error.

Answer 1

It looks like your ajax url is totally wrong and the browser interpret that is cross origin ajax request. Please simply check in browser's address bar if your ajax provided urls are valid.

Answer 2

This is mainly due to Rules of Origins (CORS), for some reason the javascript(browser) sees the request as not residing in the same server. And the reason for that, I believe, is because /home/u919084925/public_html/mod/basket.php is not seen as a valid url on the server, it should start with http://{hostname}/{path}.