splice(index,howmany)
    index 从哪个下标开始
    howmany 删除多少个

    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.     <script>
    10.         // splice(index,howmany)
    11.         // index 从哪个下标开始
    12.         // howmany 删除多少个
    13.         var arr = [1,2,3,4,5]; //[1,2,3,5];
    14.         arr.splice(3,1);
    15.         console.log(arr);
    16.     </script>
    17. </body>
    18. </html>

    1.PNG