当获取的是一组元素时，这样写为什么不行，我记得之前也有类似的写法啊？？

Question

$('li').css('color','red')

为什么不能这样直接设置

Answer 1

When a set of elements is obtained, why doesn’t it work like this? I remember there was a similar way of writing it before? ? -PHP Chinese website Q&A-When a set of elements is obtained, why can't it be written like this? I remember that there was a similar way of writing it before? ? -PHP Chinese website Q&A

Please watch and learn.

Answer 2

Okay, but the settings are all a single color red.

Answer 3

  $("li").each(function(index, element) {
            if (index % 2) {
                $(this).css('color','blue')
            }
        })

这里是2的倍数你可以用奇偶解决，可如果是3的倍数呢，如果，要按彩虹色呢，1，4，7红色，2，5，8蓝色，3，6,9黑色，或者别的，