查找父级和父级的第一个子级 [英] Find parent and first child of it's parent
问题描述
我试图找到一个元素的父级,它是父级第一个孩子,代码如下:
I am trying to find the parent of an element and it's parent first child, the code is like this:
<ul class="lowerMenu">
<li><a href="" class="selected">Welcome</a></li>
<li><a href="">Logo</a></li>
<li><a href="">Websites</a></li>
<li><a href="">Stationery</a></li>
<li><a href="">Illustration</a></li>
<li><a href="">Full Pack</a></li>
</ul>
function setIntervalAndExecute() {
changeImages();
setTimeout(function(){
showImages(imagesArray);
},500);
var intervalot = window.setInterval(function(){
changeImages();
var selected = $('.selected');
if (!selected.parent().is(':last-child')) {
$('.selected').parent().next().children().addClass('selected');
selected.removeClass('selected');
} else {
$('.selected').parent().parent().children(':first-child').addClass('selected');
selected.removeClass('selected'); // nesho ne mi rabotit ovdeki
}
window.setTimeout(function(){
showImages(imagesArray);
},500);
},10000);
return intervalot;
}
var intervalot = setIntervalAndExecute();
我知道这有点复杂,但我是新的jquery, do是在类'selected'获取到我想要删除它的最后一个元素,并将其设置为第一个元素。我尝试了这个,但它似乎不工作
I know it's a little complicated but i'm new to jquery , so what i'm trying to do is after the class 'selected' gets to the last element i want to remove it and set it to the first element. I've tried with this but it doesn't seem to be working
$('.selected').parent().parent().children(':first-child').addClass('selected');
,当它到达最后一个元素时,间隔执行两次,然后停止。
这是我正在处理的网站:
and when it gets to the last element the interval is executing twice and then stops. This is the site that i'm working on:
推荐答案
你上去两个级别,然后找到下一个孩子,你只有一个级别 - 你在上设置
,而不是它下面的选择
< li> < a>
。你需要下一个级别。所以它应该是:
If you go up two levels, then find the next child, you're only going down one level -- you're setting the selected
class on the <li>
, not the <a>
below it.. You need to go down another level. So it should be:
$('.selected').parent().parent().children(':first-child').children().addClass('selected');
另一种方法是:
$('.selected').parent().siblings(':first-child').children().addClass('selected');
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