1<div class="container">
2  <!-- class_test_1 -->
3  <div class="title">class_test1</div>
4
5  <!-- class_test_2 -->
6  <div class="title table">class_test2</div>
7
8  <!-- class_test_3 -->
9  <div class="{{flag ? 'item' : 'item-selected'}}">class_test3</div>
10
11  <!-- class_test_4 -->
12  <div class="{{a}}    {{c}}">class_test4</div>
13
14  <!-- class_test_5 -->
15  <div class="{{$idx}}{{d}} + {{$item.id}} aa">class_test5</div>
16</div>