AngularJS 1st ng-class作品第二名没有

I have the following:

我有以下内容:

<div data-ng-controller="resultsController">
    <div id="DIV1" ng-include src="'views/sidebar.html'" ng-class="showSidebar ? 'open' : 'closed' "></div>
    <div id="DIV2" ng-class="showSidebar ? 'open' : 'closed' "></div>
<div data-ng-