<!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
时间： 2024-08-02 15:09:50