Question

我有这个练习，我坚持下去他们让我做一个功能，每次点击按钮都会改变一天这就是我所做的，但每次点击都无法想办法调用这个功能问题是不使用任何图书馆这是我的剧本

<!DOCTYPE HTML>
<html>

<head>
    <title> change it</title>
</head>

<body>
    <a>today is</a>
    <a id='demo'></a>
    <script>
        var s = 0

        function add(s) {
            if (s < 6) {
                s + 1
            } else {
                return s = 0
            }
        }
        var days_of_week = ["Monday", "Tuesday", "Wednesday", "Thursday",
            "Friday", "Saturday", "Sunday"
        ]
        document.getElementById("demo").innerHTML = days_of_week[s];
    </script>
    <br><input type="button" value="next day" onclick="add(s)">
    <script>
        console.log(days_of_week[s]);
    </script>
</body>

</html>

Answer 1

下面几点没有变化。我添加了存储新的s值并将changind day name移动到函数中。

＆＃13;

<!DOCTYPE HTML>
<html>

<head>
    <title> change it</title>
</head>

<body>
    <a>today is</a>
    <a id='demo'></a>
    <script>
        var s = 0

        function add(s) {
            if (s < 6) {
                return s + 1
            } else {
                return s = 0
            }
        }
        var days_of_week = ["Monday", "Tuesday", "Wednesday", "Thursday",
            "Friday", "Saturday", "Sunday"
        ]
        function changeDay(s) {
            document.getElementById("demo").innerHTML = days_of_week[s];
        }
        changeDay(s);
    </script>
    <br><input type="button" value="next day" onclick="window.s = add(s); changeDay(s);">
    <script>
        console.log(days_of_week[s]);
    </script>
</body>

</html>

＆＃13;

每次单击更改输出值时调用函数

1 个答案: