JavaScript DOM操作之前一兄弟元素 previousElementSibling
<!DOCTYPE HTML> <html> <head> <meta charset="utf-8"> <title>三十课 - JavaScript DOM操作之前一兄弟元素 previousElementSibling</title> <script src="http://res.30ke.cn/u/js/console.js"></script> </head> <body> <h1>三十课</h1> <h2 id="subTitle">毛瑞的网络笔记本</h2> <script> var sub = document.querySelector("#subTitle"); var previous = sub.previousElementSibling; previous.style.color = "red"; </script> </body> </html>
运行结果
三十课
广告
