Knockout.js CSS绑定

时间 2019-11-12 标签 knockout.js knockout js css 绑定
<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>