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knockout 第一个实例visible

Posted on 2016-07-08 20:43  绝交  阅读(240)  评论(0)  编辑  收藏  举报 
<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title></title>
    <script src="js/knockout-3.4.0.js" type="text/javascript" charset="utf-8"></script>
</head>
<body>
<div data-bind="visible:shouldShowMessage">
    You will see this message only when "shouldShowMessage" holds a ture
</div>

<script type="text/javascript">
var myViewModel = {
    shouldShowMessage:ko.observable(true)
};
ko.applyBindings(myViewModel);
setTimeout(function(){
myViewModel.shouldShowMessage(false);
},2000);
</script>
</body>
</html>

 

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title></title>
    <script src="js/knockout-3.4.0.js" type="text/javascript" charset="utf-8"></script>
</head>
<body>
<div data-bind="visible:myValues().length>0">
    You will see this message only when "myValues" holds a ture
</div>

<script type="text/javascript">
var myViewModel = {
    myValues:ko.observableArray([])
};
ko.applyBindings(myViewModel);
setTimeout(function(){
myViewModel.myValues.push("name");
},2000);
</script>
</body>
</html>

来源：

http://knockoutjs.com/documentation/visible-binding.html