:last-child Selector
last-child selector
version added: 1.1.4jQuery(':last-child')
描述: 选择所有父级元素下的最后一个子元素。
:last 只匹配一个单独的元素， :last-child 选择器可以匹配超过一个：为每个父级元素匹配最后一个子元素。
Example:
Finds the last span in each matched div and adds some css plus a hover state.
<!DOCTYPE html>
<html>
<head>
<style>
span.solast { text-decoration:line-through; }
</style>
<script src="http://code.jquery.com/jquery-latest.min.js"></script>
</head>
<body>
<div>
<span>John,</span>
<span>Karl,</span>
<span>Brandon,</span>
<span>Sam</span>
</div>
<div>
<span>Glen,</span>
<span>Tane,</span>
<span>Ralph,</span>
<span>David</span>
</div>
<script>
$("div span:last-child")
.css({color:"red", fontSize:"80%"})
.hover(function () {
$(this).addClass("solast");
}, function () {
$(this).removeClass("solast");
});
</script>
</body>
</html>