请老师帮忙检查一下代码，谢谢

来源：4-3 编程练习

廖可爱bongbong

2021-05-30 21:03:42

相关代码：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>数组</title>
</head>
<body>
    <script>

        var arr=["有效","无效","有效","无效","无效","有效"];

        // 补充代码
        for(var i = 0; i < arr.length; i++){
            if( arr[i] == '无效'){
                arr.splice(i,1);
                i--;
            }
        }
        console.log(arr);

    </script>
</body>
</html>