first()
概述
获取匹配的第一个元素
last()
概述
获取匹配的最后个元素
<!DOCTYPE html><html> ???<head> ???????<meta charset="UTF-8"> ???????<script type="text/javascript" src="js/jquery-3.1.1.min.js" ></script> ???????<title></title> ???????<script> ???????????$(document).ready(function(){ ???????????????//first()获取匹配的第一个元素 ???????????????$("li").first().css({"color":"#FF0000","font-weight":"bold"}); ???????????????//last()获取匹配的最后一个元素 ???????????????$("li").last().css({"color":"#FF0000","font-weight":"bold"}); ???????????}); ???????</script> ???</head> ???<body> ???????<ol> ???????????<li>Java</li> ???????????<li>JavaScript</li> ???????????<li>C#</li> ???????????<li>CSS</li> ???????????<li>HTML</li> ???????</ol> ???</body></html>jQuery筛选--first()和last()
原文地址：https://www.cnblogs.com/xianya/p/9957758.html