ASP.NET MVC “Ajax.BeginForm” executes OnSuccess even though model is not valid

Question

I have a \"submit feedback\" form which uses \"Ajax.BeginForm\" to render a partial containing the form elements. The OnSuccess event is triggering even if the ModelState is

Answer 1

Slight variation on Luis' answer:

function OnSuccess() {
    if ($("span[class='field-validation-error']").length == 0) {
        alert("Target Platform saved Successfully.");
    }
}