<!DOCTYPE html><html lang="en"><head> ???<meta charset="UTF-8"> ???<title>Title</title> ???<style> ???????ul>li { ???????????width: 100px; ???????????height: 100px; ???????????background-color: pink; ???????????display: block; ???????????margin-top: 10px; ???????} ???</style></head><body><ul> ???<li>01</li> ???<li>02</li> ???<li>03</li> ???<li>04</li> ???<li>05</li> ???<li>06</li> ???<li>07</li> ???<li>08</li> ???<li>09</li> ???<li>10</li></ul><script src="jquery-3.2.1.js"></script><script> ???$(function () { ???????// 遍历方法1 ???????// for (var index = 0; index < $("ul>li").length; index++) { ???????// ????$("ul>li").eq(index).css("opacity", (index+1)/10); ???????// } ???????// 遍历方法2 ???????$("ul>li").each(function (index, element) { ??????????$("ul>li").eq(index).css("opacity", (index+1)/10); ???????}); ???});</script></body></html><jQuery> <方法> 十九. each()方法(遍历方法)
原文地址：https://www.cnblogs.com/ZeroHour/p/8278637.html