[ประกอบหนังสือ Bootstrap]

popover_example.html

<button type="button" class="btn btn-lg btn-primary" data-toggle="popover" 
  data-content="This is a content." title="Left" data-placement="left">
  Popover
</button>
<button type="button" class="btn btn-lg btn-default" data-toggle="popover" 
  data-content="This is a content." title="Top" data-placement="top">
  Popover
</button>
<button type="button" class="btn btn-lg btn-success" data-toggle="popover" 
  data-content="This is a content." title="Bottom" data-placement="bottom">
  Popover
</button>
<button type="button" class="btn btn-lg btn-danger" data-toggle="popover" 
  data-content="This is a content." title="Right" data-placement="right">
  Popover
</button>