在ajax调用后添加类不起作用[关闭]

add class works before ajax call but not after ajax call?

$.ajax({
            type: "POST",
            url: "../ajax/basket.php",
            data: {planproductId: productIDVal, action: "addToBasket"},
            success: function(theResponse) {
                if (theResponse.indexOf("<li>" < 0))
                {
                    $("#notication").addClass('error-box');
                    $("#notification").text(theResponse);
                    $("#notificationsLoader").empty();
                    return;
                }
            }
       });

.error-box {
    background:#ffecec url('../img/error.png') no-repeat 10px 50%;
    border:1px solid #f5aca6;
}

Your if condition is wrong - it should be like this (assuming #notication being a typo)

 if (theResponse.indexOf("<li>") < 0)

This should be...

$("#notification").addClass('error-box');

Not...

$("#notication").addClass('error-box');

And this should be...

 if (theResponse.indexOf("<li>") < 0)