“Ctrl+/”
“F11/ESC”
<!DOCTYPE html>
<html>
<script src="https://apps.bdimg.com/libs/angular.js/1.3.9/angular.min.js"></script>
<body>
<div ng-app="" ng-init="hour=13">
<p ng-show="hour > 12">我是可见的。</p>
</div>
</body>
</html>