一个渐进增强选择多个表单元素。它提供了一个更简单的选择与下列优势:

便于用户理解和相互作用比一般选择多个表单元素。用户知道如何与它无指令。

不需要用户按下shift再单击ctrl或多个元素。而不是你的用户可以添加或删除元素的形式独立,没有风险失去那些已经被选中。

选中的元素总是可见(的范围内你的接口),而未经选择的元素总是隐藏(在一个常规的选择)。

-A progressive enhancement to select multiple form elements. It provides a simpler alternative with the following advantages:

Easier for users to understand and interact with than regular select multiple form elements. Users know how to interact with it sans instruction.

Doesn t require user to Ctrl-Click or Shift-Click multiple elements. Instead users of your form can add or remove elements individually, without risk of losing those that have already been selected.

Selected elements are always visible (within the confines of your interface) while unselected elements are always hidden (within a regular select).