jQuery查看是否选中了任何复选框 [英] jQuery see if any or no checkboxes are selected

问题描述

我知道如何选择是否选中了一个单独的复选框。

I know how to see if an individual checkbox is selected or not.

但我遇到以下问题 - 给定一个表单ID我需要看看是否<选择em>任何复选框（即1个或更多），我需要查看是否选择了 none 。基本上我需要两个独立的功能来回答这两个问题。帮助将不胜感激。谢谢！

But Im having trouble with the following - given a form id I need to see if any of the checkboxes are selected (i.e 1 or more), and I need to see if none are selected. Basically I need two separate functions that answer these two questions. Help would be appreciated. Thanks!

实际上，我只需要一个函数来告诉我是否选择了 none 。知道这会回答另一个问题。

Actually, I would just need a function to tell me if none are selected. Knowing this would answer the other question.

推荐答案

你可以使用这样的东西

if ($("#formID input:checkbox:checked").length > 0)
{
    // any one is checked
}
else
{
   // none is checked
}

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