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. <!-- -->
    10. <script>
    11. var arr = ["html","css"];
    12. // push
    13. arr.push("js");
    14. console.log(arr);
    15. </script>
    16. </body>
    17. </html>