检查是否选中所有复选框 [英] Check if all checkboxes are selected

问题描述

如何检查是否选中了所有带有class="abc"的复选框?

How do I check if all checkboxes with class="abc" are selected?

每当其中一项被选中或未选中时，我都需要对其进行检查.我是点击还是更改?

I need to check it every time one of them is checked or unchecked. Do I do it on click or change?

推荐答案

我认为最简单的方法是检查这种情况:

I think the easiest way is checking for this condition:

$('.abc:checked').length == $('.abc').length

您可以在每次选中新复选框时执行此操作:

You could do it every time a new checkbox is checked:

$(".abc").change(function(){
    if ($('.abc:checked').length == $('.abc').length) {
       //do something
    }
});

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