请老师检查

来源：3-4 自由编程

慕数据4158169

2021-04-08 22:14:20

相关代码：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>

</body>
<script>

    let sum =localStorage.getItem('summ')
    console.log(sum);
    if(sum == null){
        sum = 1;
        localStorage.setItem('summ',sum);
    }else{
        sum++;
        localStorage.setItem('summ',sum);
    }
    window.onload = ()=>{
        document.write(`这是您第${sum}次访问页面`)
    }


</script>
</html>