Bootstrap按钮下拉菜单组件详解_javascript技巧

 

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  按钮下拉菜单
  
 
 

  
菜单列表1
  
菜单列表2
  
菜单列表3
  
菜单列表4
  
菜单列表5
 
 

.btn-group .dropdown-toggle:active,
.btn-group.open .dropdown-toggle {
 outline: 0;
}
.btn-group > .btn + .dropdown-toggle {
 padding-right: 8px;
 padding-left: 8px;
}
.btn-group > .btn-lg + .dropdown-toggle {
 padding-right: 12px;
 padding-left: 12px;
}
.btn-group.open .dropdown-toggle {
 -webkit-box-shadow: inset 0 3px 5px rgba(0, 0, 0, .125);
  box-shadow: inset 0 3px 5px rgba(0, 0, 0, .125);
}
.btn-group.open .dropdown-toggle.btn-link {
 -webkit-box-shadow: none;
  box-shadow: none;
}

 按钮下拉菜单
 

.caret {
 display: inline-block;
 width: 0;
 height: 0;
 margin-left: 2px;
 vertical-align: middle;
 border-top: 4px solid;
 border-right: 4px solid transparent;
 border-left: 4px solid transparent;
}