<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
<script src="js/jquery-1.11.1.min.js"></script>
<script src="js/knockout-3.3.0.js"></script>
<style>
.b_b
{
background-color: blue;
}
</style>
<script type="text/javascript">
var viewModel = {
currentProfit: ko.observable(1) // Positive value, so initially we don't apply the "bb" class
};
$(function () {
viewModel.currentProfit(-1); // Causes the "bb" class to be applied
ko.applyBindings(viewModel);
})
</script>
</head>
<body>
<div data-bind="css: { 'b_b': currentProfit() < 0 }">
Profit Information
</div>
</body>
