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Bootstrap button drop-down menu example tutorial

零下一度
零下一度Original
2017-07-03 11:57:201488browse

Previous words

The button-type drop-down menu looks basically the same as the drop-down menu in appearance. The difference is that ordinary drop-down menus are block elements, while button drop-down menus are inline-block elements. This article will introduce the Bootstrap button drop-down menu in detail

Overview

The button drop-down menu is actually an ordinary drop-down menu. The only difference is the external container "div.dropdown" Changed to "div.btn-group", the display changed from block to inline-block

<div class="btn-group">
  <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">按钮式下拉菜单 <span class="caret"></span>
  </button>
  <ul class="dropdown-menu"><li><a href="#">Action</a></li><li><a href="#">Another action</a></li><li><a href="#">Something else here</a></li><li role="separator" class="divider"></li><li><a href="#">Separated link</a></li>
  </ul></div><div class="dropdown">
  <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">普通下拉菜单 <span class="caret"></span>
  </button>
  <ul class="dropdown-menu"><li><a href="#">Action</a></li><li><a href="#">Another action</a></li><li><a href="#">Something else here</a></li><li role="separator" class="divider"></li><li><a href="#">Separated link</a></li>
  </ul></div>


Pop up

Some menus need to pop up. For example, the menu is at the bottom of the page, and this menu happens to have a drop-down menu. In order to give users a better experience, the drop-down menu has to pop up. In the Bootstrap framework, a class name "dropup" is specially proposed for this effect. You only need to add this class name to "btn-group"

[Triangle]

 Button The default downward triangle is created by adding a "" tag element to the

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