# bootstrap下拉按钮大小不一致问题
在使用bootstrap下来按钮遇到一个问题,运行示例代码主按钮和拉下按钮两个大小不一致:
<div class="btn-group">
<a class="btn dropdown-toggle" data-toggle="dropdown" href="#">
选择类型
<span class="caret"></span>
</a>
<ul class="dropdown-menu">
<!-- 下拉菜单的链接 -->
</ul>
</div>
解决: 在页面首行增加h5标识:
<!DOCTYPE html>
bootstrap文档专门有说明
Bootstrap makes use of certain HTML elements and CSS properties that
require the use of the HTML5 doctype. Include it at the beginning of
all your projects.