1. <!DOCTYPE html>
    2. <html lang="en">
    3. <head>
    4.     <meta charset="UTF-8">
    5.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
    6.     <title>Document</title>
    7. </head>
    8. <body>
    9.     <p id="p">hello world</p>
    10.     <script>
    11.         var p =  document.getElementById("p");
    12.         p.after("after")
    13.         p.before("before")
    14.     </script>
    15. </body>
    16. </html>

    1.PNG