替换dom操作

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title></title>
    </head>
    <body>
        <h1>标题1</h1>
        <h1>标题2</h1>
        <script type="text/javascript">
            var body = document.querySelector('body')
            var hbiaoti2 = document.querySelectorAll('h1')[1]
            
            var newDiv = document.createElement('p')
            newDiv.innerHTML = '这是一个段落'
                //这是替换
        //            body.replaceChild(newDiv,hbiaot                    
            //插入到某个元素的前面
                body.insertBefore(newDiv,hbiaoti2)
            
            //插入到某个元素的后面,原生JS里没有insertAfter
            body.insertBefore(newDiv,hbiaoti2.nextElementSibling)
            
            
        </script>
    </body>
</html>