我有各种 UL ,我需要了解所有现有的 UL ,有多少 UL 有两个 UL ,我正在尝试用每个人做,这将是正确的方式。
$(function(){
var count = '';
var total = 1;
$('ul li').each(function(index, el) {
count++;
if(count == 12) {
total + 1;
}
count = '';
});
console.log('We found 2 UL with 2 li');
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<ul>
<li>Item</li>
</ul>
<ul>
<li>Item</li>
</ul>
<ul>
<li>Item</li>
<li>Item</li>
</ul>
<ul>
<li>Item</li>
<li>Item</li>
<li>Item</li>
<li>Item</li>
</ul>
<ul>
<li>Item</li>
<li>Item</li>
</ul>
此代码,结果:我们发现2 UL和2 li。
答案 0 :(得分:2)
<script type="text/javascript">
$(document).ready(function(){
$('#fldCategory UL LI A').click(function (e) {
var sVal = e.currentTarget.text;
$('#fldCategory BUTTON').html(sVal + ' <span class="caret"></span>');
console.log(sVal);
});
});
</script>
&#13;
$(function() {
$('ul').filter(function() {
return $(this).children('li').length == 2
}).css("background-color", "red")
console.log('We found 2 UL with 2 li');
});
&#13;
您可以使用过滤器然后返回ul长度为== 2
的ul答案 1 :(得分:1)
var count = 0;
$('ul').each(function(index, item) {
if($(this).children('li').length == 2)
{
count++;
}
});
if(count > 0)
{
console.log('We found '+ count +' UL with 2 li');
}
else
{
console.log('no such li is found')
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<ul>
<li>Item</li>
</ul>
<ul>
<li>Item</li>
</ul>
<ul>
<li>Item</li>
<li>Item</li>
</ul>
<ul>
<li>Item</li>
<li>Item</li>
<li>Item</li>
<li>Item</li>
</ul>
<ul>
<li>Item</li>
<li>Item</li>
</ul>
<ul>
<li>Item</li>
<li>Item</li>
</ul>