JavaScript DOM操作之节点前插入 insertBefore
<!DOCTYPE HTML> <html> <head> <meta charset="utf-8"> <title>三十课 - JavaScript DOM操作之节点前插入 insertBefore</title> <script src="http://res.30ke.cn/res/js/console.js"></script> </head> <body> <div> <h2 id="subTitle">毛瑞的笔记本</h2> </div> <script> var h2 = document.querySelector("#subTitle"); var h1 = document.createElement("h1"); h1.textContent = "三十课"; h2.parentNode.insertBefore(h1,h2); </script> </body> </html>
运行结果
三十课
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