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Knockout JS mapping plugin confusion
{
    "members": [
        {
            "memberid": "001",
            "membername": "Jason"
        },
       {
            "memberid": "002",
            "membername": "Bob"
        }
    ]
}

<div data-bind="foreach: members">
<h3 data-bind="text: memberid"></h3>
<p>Name: <span data-bind="text: membername"></span></p>
</div>

var data = $.getJSON("members.json",function(data)
            {
                var viewModel = ko.mapping.fromJSON(data);
                 ko.applyBindings(viewModel);

            }
        );

ko.mapping.fromJSON(data, viewModel);

var viewModel = {};
var data = $.getJSON("members.json",function(data)
            {
                viewModel.model = ko.mapping.fromJSON(data);
                 ko.applyBindings(viewModel);
            }
        );