"Latest" Base Fiddle

Latest copy of: -jQuery templates -KnockoutJS -KO Mapping plugin

HTML

<script src="http://knockoutjs.com/downloads/knockout-3.0.0.debug.js"></script>
<script src="https://rawgit.com/SteveSanderson/knockout.mapping/master/build/output/knockout.mapping-latest.debug.js"></script>

JavaScript

var data = [{ b1: "v1" }, { b1: "v2" }];

var result = ko.mapping.fromJS(data, {
    create: function(options) {
			var nestedData = options.data;
  		return ko.mapping.fromJS(nestedData, { 'copy': 'b1' });
    }
});

console.log(result());