<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> <script type="text/javascript"> var viewModel = { currentProfit: ko.observable(1) }; $(function () { viewModel.currentProfit(-1); ko.applyBindings(viewModel); }) </script> </head> <body> <div data-bind="style: { color: currentProfit() < 0 ? ‘red‘ : ‘black‘ }"> Profit Information </div> </body>
原文：http://www.cnblogs.com/YuanSong/p/4736611.html