Question

我发现javascript源代码就像秒表一样工作，并动态显示数据开始时间，结束时间长度和表中两个时间间隔之间的时间。下一次点击后，第一行会下降，但我需要在下次点击后首先保留第一行，然后下一个数据将逐一显示。

感谢所有

enter code here
<html>
<head>
    <script type="text/javascript" src="http://code.jquery.com/jquery-1.3.2.js"></script>
    <script type="text/javascript">
        function PadDigits(n, totalDigits)
        {
            n = n.toString();
            var pd = '';
            if (totalDigits > n.length)
            {
                for (i=0; i < (totalDigits-n.length); i++)


                {
                    pd += '0';
                }
            }
            return pd + n.toString();
        }

        var lastEndTime = null;
        var starttime = null;
        var endtime = null;

        function startTimer()
        {
            date = new Date();
            starttime = date;
            if(lastEndTime == null)
            {
                $('#history').html('');
            }
            $('#action').html('<img src="pause.png"><br>Stop Timer');
        }

        function stopTimer()
        {
            $('#action').html('<img src="play.png"><br>Start Timer');
            date = new Date();
            endtime = date;
            addRowToTable(starttime,endtime,lastEndTime);
            lastEndTime = endtime;
            endtime = null;
            starttime = null;
        }

        function addRowToTable(starttime,endtime,lastEndTime)
        {

            formattedStart = PadDigits(starttime.getHours(),2)+':'+PadDigits(starttime.getMinutes(),2)+":"+PadDigits(starttime.getSeconds(),2);
            formattedEnd = PadDigits(endtime.getHours(),2)+':'+PadDigits(endtime.getMinutes(),2)+":"+PadDigits(endtime.getSeconds(),2);

            seconds = parseInt((endtime.getTime() - starttime.getTime())/1000);

            lengthMinutes = parseInt(seconds/60);
            lengthSeconds = parseInt(seconds%60);
            lengthFormatted = PadDigits(lengthMinutes,2)+":"+PadDigits(lengthSeconds,2);

            if(lastEndTime == null)
            {
                timeBetweenFormatted = "N/A";
            }
            else
            {
                timeBetween = parseInt((starttime.getTime() - lastEndTime.getTime())/1000);
                timeBetweenMinutes = parseInt(timeBetween/60);
                timeBetweenSeconds = parseInt(timeBetween%60);
                timeBetweenFormatted = PadDigits(timeBetweenMinutes,2)+":"+PadDigits(timeBetweenSeconds,2);
            }



            $('#history').prepend('<tr><td>'+formattedStart+'</td><td>'+formattedEnd+'</td><td>'+lengthFormatted+'</td><td>'+timeBetweenFormatted+'</td></tr>')
        }

        function toggleTimer()
        {
            if (starttime == null)
            {
                startTimer();
            }
            else
            {
                stopTimer();
            }
        }

        $(document).ready(function(){
            $('#action').click(function(kevent){
                toggleTimer();
            });

            $(document).keypress(function(kevent){
                $('#action').click();
            });
        });
    </script>

    <style type="text/css">
        body, body *{
            font-family: Helvetica;
        }
        body{
            margin:0px;
        }
        table.data-table
        {
            width: 100%;
            background-color: #FFFFFF;
            font-size: 11px ;
            border: 0px;
            border-collapse: collapse;
            border-top: 1px solid #000000;
            border-bottom: 1px solid #000000;
        }
        table.data-table thead
        {
            border-top: 1px solid #000000;
            border-bottom: 1px solid #000000;
        }
        table.data-table thead th
        {
            background: #DDDDDD url(data-table-header.png) repeat-x top;
            background: -webkit-gradient(linear, 0% 0%, 0% 100%, from(rgb(248, 248, 248)), color-stop(0.5, rgb(248, 248, 248)), color-stop(0.5, rgb(233, 233, 233)), to(rgb(233, 233, 233))) content-box padding-box;
            text-align: left;
            padding-left: 2px;
        }
        table.data-table tr:nth-child(2n)
        {
            background-color: #ECF3FE;
        }
        table.data-table tr:odd
        {
            background-color: #ECF3FE;
        }
        table.data-table td
        {
            padding-left: 2px;
        }
        table.data-table tbody
        {
            overflow-y: auto;
        }
        #action
        {
            border: 0px;
            background: transparent;
        }
    </style>
</head>
<body>
    <button type="button" id="action"><img src="play.png"><br>Start Timer</button><br>

    <div>
        <table class="data-table">
            <thead>
                <tr>
                    <th>Start Time</th>
                    <th>End Time</th>
                    <th>Length</th>
                    <th>Time Between</th>
                </tr>
            </thead>
            <tbody id="history">
            </tbody>
        </table>
    </div>
</body>
</html>

Answer 1

只需检查代码中的addRowToTable（）方法，最后使用的方法是

.prepend()

只需用

替换它

.append()

kepp一切都是。

Answer 2

只需将$('#history').prepand()更新为$('#history').append()，就像这样：

    $('#history').append(
    <tr><td>'+formattedStart+'</td><td>'+formattedEnd+'</td><td>'+lengthFormatted+'</td><td>'+timeBetweenFormatted+'</td></tr>')}

因此，它会在History Div的末尾插入Table Row。

Answer 3

以下是工作示例fidle

您只需要将prepend方法更改为追加方法

 $('#history').append('<tr><td>'+formattedStart+'</td><td>'+formattedEnd+'</td><td>'+lengthFormatted+'</td><td>'+timeBetweenFormatted+'</td></tr>')
    }

动态表第一行需要先播种

3 个答案: