Scroll table columns

by Yusril Maulidan Raji

HTML

<button id="left">&larr;</button>
<button id="right">&rarr;</button>

<div id="table-wrapper">
  <table border="1">
    <thead>
      <tr>
        <th>Heading1</th>
        <th>Heading2</th>
        <th>Heading3</th>
        <th>Heading4</th>
        <th>Heading5</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td>1<br/>asdasdada</td>
        <td>12</td>
        <td>13</td>
        <td>14</td>
        <td>15</td>
      </tr>
      <tr>
        <td>2<br/>asdasdada<br/>asdasdada</td>
        <td>22</td>
        <td>23</td>
        <td>24</td>
        <td>25</td>
      </tr>
      <tr>
        <td>3<br/>asdasdada</td>
        <td>32</td>
        <td>33</td>
        <td>34</td>
        <td>35</td>
      </tr>
      <tr>
        <td>4<br/>asdasdada<br/>asdasdada<br/>asdasdada<br/>asdasdada<br/>asdasdada</td>
        <td>42</td>
        <td>43</td>
        <td>44</td>
        <td>45</td>
      </tr>
      <tr>
        <td>5<br/>asdasdada</td>
        <td>52</td>
        <td>53</td>
        <td>54</td>
        <td>55</td>
      </tr>
    </tbody>
  </table>

</div>

CSS

#table-wrapper {
  width: 95%;
  float: left;
  overflow-x: scroll;
  background: #ddd;
}

table {
  background: #fff;
  width: 1200px;
  text-align: center;
  overflow: hidden;
  position: relative;
}

table thead tr th {
  width: 15em;
}

table thead tr th:first-child,
table tbody tr td:first-child {
  top: auto;
  left: 0.5;
  position: fixed;
  width: 6em;
}

table thead tr th:nth-child(2),
table tbody tr td:nth-child(2) {
  padding-left: 7em;
  /*to show second column behind the first*/
}

JavaScript

$(document).ready(function() {
  $("#right").on("click", function() {
var leftPos = $('#table-wrapper').scrollLeft();
    console.log(leftPos); 
    $("#table-wrapper").animate({
        scrollLeft: leftPos - 200
    }, 800);
  });

  $("#left").on("click", function() {
   var leftPos = $('#table-wrapper').scrollLeft();
    console.log(leftPos); 
    $("#table-wrapper").animate({
        scrollLeft: leftPos + 200
    }, 800);
  });
  
  var t0 = performance.now();
  $('table tbody tr td:first-child').each(function(){
  	var height = $(this).height();
    $(this).parent().find('td').height(height);
  });
	var t1 = performance.now();
	alert("Call to height\(\) took " + (t1 - t0) + " milliseconds.");
  
  // Adjust the th and td's height.
  // Improve the performance by using native js + for loop.
  var t3 = performance.now();
  var firstColumn = $('#table-wrapper td:first-child');
  for (var i = 0; i < firstColumn.length; i++) {
    firstColumn[i].parentNode.style.height = firstColumn[i].offsetHeight + "px";
  }
	var t4 = performance.now();
	alert("Call to style.height took " + (t4 - t3) + " milliseconds.");

});