使用$（this）时filter（）无法正常工作

Question

Can someone explain why this works:

$(function(){
    $("ol li a").click(function(){
        $("ol li a").filter(":even").css("color", "orange");
    });
});

But this doesn't:

$(function(){
    $("ol li a").click(function(){
        $(this).filter(":even").css("color", "orange");
    });
});

I thought using $(this) in this context would refer to the jquery object which has my original selector in it.

Answer 1

因为$(this)是单个元素（事件的目标），而$("ol li a") 0到N个与该扇区匹配的元素。

Answer 2

this is not collection of the elements that correspond to original selector, it is particular element that received the event. If you have selector that returns single element than $(this) and $(selector) are interchangeable, but not in your case.

Answer 3

当您单击按钮时，事件将触发并创建$(this) ，但是， $(this)仅是被单击的元素，而不是整个元素集，因此将无法过滤，因为只有一个元素。