<button type="button" class="btn btn-default"> <span class="glyphicon glyphicon-sort-by-attributes"></span></button>

<div class="dropdown"> <button type="button" class="btn dropdown-toggle" id="dropdownMenu1"  data-toggle="dropdown"> 主題 <span class="caret"></span> </button> <ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu1"> <li role="presentation" class="dropdown-header">下拉菜單標題</li> <li role="presentation"> <a role="menuitem" tabindex="-1" href="#">選項1</a> </li> <li role="presentation"> <a role="menuitem" tabindex="-1" href="#">選項2</a> </li> <li role="presentation">  <a role="menuitem" tabindex="-1" href="#">選項3</a> </li> <li role="presentation" class="divider"></li><!--分割線--> <li role="presentation"> <a role="menuitem" tabindex="-1" href="#">分離的鏈接</a> </li> </ul></div>

<div class="btn-toolbar" role="toolbar"><!--用來嵌套btn-group--> <div class="btn-group btn-group-lg"> <!--btn-group-lg用來控制按鈕組的大小,bt-group-vertical是垂直的按鈕組,bt-group也可以嵌套bt-group--> <button type="button" class="btn btn-default">Button 1</button> <button type="button" class="btn btn-default">Button 2</button> <button type="button" class="btn btn-default">Button 3</button> </div> <div class="btn-group btn-group-sm"> <button type="button" class="btn btn-default">Button 4</button> <button type="button" class="btn btn-default">Button 5</button> <button type="button" class="btn btn-default">Button 6</button> </div> <div class="btn-group btn-group-xs"> <button type="button" class="btn btn-default">Button 7</button> <button type="button" class="btn btn-default">Button 8</button> <button type="button" class="btn btn-default">Button 9</button> </div></div>

 <div class="btn-group"><!--加類.dropup可以變成按鈕上拉菜單--> <button type="button" class="btn btn-default dropdown-toggle"  data-toggle="dropdown"> <!-- 加類.btn-xs之類的東西改變按鈕大小--> 默認 <span class="caret"></span> </button> <ul class="dropdown-menu" role="menu"> <li><a href="#">功能</a></li> <li><a href="#">另一個功能</a></li> <li><a href="#">其他</a></li> <li class="divider"></li><!--分割線--> <li><a href="#">分離的鏈接</a></li> </ul> </div>

<form class="bs-example bs-example-form" role="form"> <div class="input-group input-group-lg"><!--input-group-lg調整輸入框組大小--> <input type="text" class="form-control"> <span class="input-group-addon">.00</span> </div> <br> <div class="input-group"> <span class="input-group-addon"> <input type="checkbox"><!--復選框和單選框都能應用于輸入框組--> </span> <input type="text" class="form-control"> </div> <br> <div class="input-group"> <input type="text" class="form-control"> <span class="input-group-btn"><!--按鈕也能應用于輸入框組請注意這里的類變為了input-group-btn，甚至可以加上前面的按鈕下拉菜單--> <button class="btn btn-default" type="button"> Go! </button> </span> </div> </form>