<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">
?????????<a?role="menuitem"?tabindex="-1"?href="#">Java</a>
??????</li>
??????<li?role="presentation">
?????????<a?role="menuitem"?tabindex="-1"?href="#">數據挖掘</a>
??????</li>
??????<li?role="presentation">
?????????<a?role="menuitem"?tabindex="-1"?href="#">
????????????數據通信/網絡
?????????</a>
??????</li>
??????<li?role="presentation"?class="divider"></li>
??????<li?role="presentation">
?????????<a?role="menuitem"?tabindex="-1"?href="#">分離的鏈接</a>
??????</li>
???</ul>
</div>
代碼如下，求大神仔細講解一下，class href 和id 的我知道，其余的是什么意思？比如說 role
更好的自己lin
2017-02-10 16:40:20
