javascript - 使用一个 jquery 函数计算多个输入字段的工作时间

Question

我正在尝试建立一个基于“电子表格”的网站，该网站将用于计算一组“员工”使用的时间/劳动力。我能够弄清楚如何计算其中一名“员工”的工作时间，但我无法弄清楚如何对其他“员工”使用相同的公式/函数。 This jsfiddle到目前为止我已经能够整理出基本结构。

<form>
  <table id="actual" cellspacing="0px">
    <tr>
      <th>Name</th>
      <th>Start Time</th>
      <th>End Time</th>
      <th>
        Total Time
      <br/> Worked
    </th>
</tr>
<tr>
  <th>Greg Weiland</th>
  <td>
    <input class="Time1" type="time">
  </td>
  <td>
    <input class="Time2" type="time">
  </td>
  <td>
    <input class="Hours">
  </td>
</tr>
<tr>
  <th>Alicia Hawly</th>
  <td>
    <input class="Time1" type="time">
  </td>
  <td>
    <input class="Time2" type="time">
  </td>
  <td>
    <input class="Hours">
  </td>
</tr>
<tr>
  <th>Charlen Connoly</th>
  <td>
    <input type="time">
  </td>
  <td>
    <input type="time">
  </td>
  <td>&nbsp;</td>
</tr>
<tr>
  <th>Dakota Giles</th>
  <td>
    <input type="time">
  </td>
  <td>
    <input type="time">
  </td>
  <td>&nbsp;</td>
</tr>
<tr>
  <th>Donovan Cole</th>
  <td>
    <input type="time">
  </td>
  <td>
    <input type="time">
  </td>
  <td>&nbsp;</td>
</tr>
<tr>
  <th>Robert Hill</th>
  <td>
    <input type="time">
  </td>
  <td>
    <input type="time">
  </td>
  <td>&nbsp;</td>
</tr>
<tr>
  <th>Douglas Spirs</th>
  <td>

$(function() {
  function calculate() {
   var time1 = $(".Time1").val().split(':'),
     time2 = $(".Time2").val().split(':');
   var hours1 = parseInt(time1[0], 10),
     hours2 = parseInt(time2[0], 10),
     mins1 = parseInt(time1[1], 10),
     mins2 = parseInt(time2[1], 10);
   var hours = hours2 - hours1,
     mins = 0;
   if (hours < 0) hours = 24 + hours;
   if (mins2 >= mins1) {
     mins = mins2 - mins1;
   } else {
     mins = (mins2 + 60) - mins1;
     hours--;
   }
   mins = mins / 60; // take percentage in 60
   hours += mins;
   hours = hours.toFixed(2);
   $(".Hours").val(hours);
 }
 $(".Time1,.Time2").change(calculate);
 calculate();
});

任何帮助将不胜感激，因为我不确定如何让其他员工正确计算时间。

请注意，我不关心计算是通过单个按钮完成还是通过更改“单元格”的值来完成。

Answer 1

这是一种不同的方法，可以用更少的代码完成您所要求的任务。此外，我还使用包含所有员工姓名的数组来缩短编写所需的 HTML。这使得如果您需要添加或删除员工，就会容易得多 - 您所做的就是将其直接删除或添加到列表中，然后 foreach 循环会为您创建表行。这使用与上面的方法类似的 .each() ，但利用您用来进行数学计算的时间类型输入。

fiddle :https://jsfiddle.net/arcxdff2/10/

JS

$(function() {
  var employees = ['Greg Weiland', 'Alicia Hawly', 'Charlen Connoly', 'Dakota Giles', 'Donovan Cole', 'Robert Hill', 'Douglas Spirs', 'Casey Green', 'Jared Peterson', 'Elizabeth P', 'Carl Mark', 'Carma J.', 'Ike J.', 'Elias H.'];

  //This for each loop will write the employee names in the array above into their own rows
  for (i = 0; i < employees.length; i++) {
    $('#footer').after('<tr class="rowEmployee"><th>' + employees[i] +
      '</th><td><input class="Time1" type="time"></td>' +
      '<td><input class="Time2" type="time">' +
      '</td><td><input class="Hours"></td></tr>')
  }

  $('#btnSubmit').on('click', function() {
    $('.rowEmployee').each(function() {
      var time1 = $('.Time1', this).val().split(':');
      var time2 = $('.Time2', this).val().split(':');
      //The following calculations turn minutes into a fraction to make the math easier
      var hoursWorked1 = parseInt(time1[0]) + ((parseInt(time1[1]) == 0) ? 0 : (parseInt(time1[1]) / 60));
      var hoursWorked2 = parseInt(time2[0]) + ((parseInt(time2[1]) == 0) ? 0 : (parseInt(time2[1]) / 60));
      //Here is your difference in hours calculation below
      var diff = hoursWorked2 - hoursWorked1;
      //Finally, write the total hours worked to the textbox, rounding to nearest hundredth
      $('.Hours', this).val(Math.round(diff*100)/100);
    });
  });
});

HTML

<table id="actual" cellspacing="0px">
  <tr id='header'>
    <th>Name</th>
    <th>Start Time</th>
    <th>End Time</th>
    <th>
      Total Time
      <br/> Worked
    </th>
  </tr>
  <!-- Add the ID of footer so the JS knows where to append the rows containing employee names -->
  <tr id="footer">
    <td colspan="4">&nbsp;</td>
  </tr>
  <tr>
    <td colspan="4" align="center">
      <button id='btnSubmit'>Submit</button>
    </td>
  </tr>
</table>