jQuery键和值

{
    "clientIds": [{ 
        "id": 0,
        "clientId": "check123"
    }]
}

The above is json object. How to split this into key value? I got key is: clientIds but value comes object I want check123 value and append in dropdown using jquery how to divide and append in dropdown.

You can access the clientId and Id as

var a = {"clientIds":[{"id":0,"clientId":"check123"}]};
alert(a.clientIds[0].clientId);

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>

</div>

To take the object and turn it into options in a select menu do the following.

for(var i = 0; i < clientIds.length; i++){
   $('#dropdown').append($('<option />').val(clientIds[i].id)).text(clientIds[i].clientId));
}

Since clientIds is an array, iterate over it.

 var data = {"clientIds":[{"id":0,"clientId":"check123"}]};
 $.each(data, function(index, element) {
    var id = element.id; // will have the value 0
     var clientId = element.clientId; // will have the value check123
 });

Once you got these, build your dropdown.

   var a = {"clientIds":[{"id":0,"clientId":"check123"}]};
       $.each( a.clientIds,function () {
          $('#dropdown').append($('<option />').val($(this).id)).text($(this).clientId);
       });

Try this:

var a = {"clientIds":[{"id":0,"clientId":"check123"}]};
for(i=0;i<a.clientIds.length;i++)
    $('#myoptions').append($('<option value="'+a.clientIds[i].id+'">'+a.clientIds[i].clientId+'</option>'));

DEMO FIDDLE