Question

I got error

“Use of attributes’ specified attribute is deprecated. It always returns true.
return !val || val.specified ? elem.value : elem.text;”

    $(document).ready(function(){
    $("#o_productCategory").change(function(e){
        $.getJSON("URI", ({"parent" : $("#o_productCategory").val()}),function(result) {
            //code here
        });
    });
});

Answer 1

The error looks related to $("#o_productCategory").val(). Possibly this or this.

Because you’re inside $("#o_productCategory")‘s change callback, you could use this.value instead.

$.getJSON("URI", { "parent" : this.value }, function (result) {
    //code here
});