knockoutjs：Example 2: 表示と非表示：The visible binding

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<title>knockoutjs：Example 2: 表示と非表示：The visible binding</title>
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<h1>knockoutjs：Example 2: 表示と非表示：The visible binding</h1>
<div data-bind="visible: myValues().length > 0">
You will see this message only when 'myValues' has at least one member.
</div>
<script type="text/javascript">
var viewModel = {
myValues: ko.observableArray([]) // Initially empty, so message hidden
};
viewModel.myValues.push("some value"); // Now visible
ko.applyBindings(viewModel);
</script>
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