How to get the JSON with duplicate keys completely in javascript

If you can’t change the server response, for simple JSON data you can request the json like text and parse it like a string:

var check = new RegExp('["\']([^\'"]*)[\'"][^:]*:[^"\']*["\']([^\'"]*)[\'"]',"g");
    $.ajax({
        url : "text.json",
        dataType : "text",
        success : function(data){
            var newData = {};
            data.replace(check,function(a,b,c){
                if(typeof newData[b] == "undefined"){
                    newData[b] = c;
                }else if(typeof newData[b] == "object"){
                    newData[b].push(c);
                }else{
                    var ca = newData[b];
                    newData[b] = [ca,c];                     
                }
                return a;
            });
            console.log(newData);
            console.log($.parseJSON(data));
        },
        error : function(e,a){
            console.log(e,a);
        }
    });

in this code newData with your json is:

{"s": ["wae","asd"]}