With custom implementation. Just simple like this:
table {
table-layout: fixed;
width: 100%;
*margin-left: -100px;/*ie7*/
}
td, th {
vertical-align: top;
border-top: 1px solid #ccc;
padding:10px;
width:100px;
}
.col1{
position:absolute;
*position: relative; /*ie7*/
left:0;
width:100px;
}
.col2{
position:absolute;
*position: relative; /*ie7*/
left:100px;
width:100px;
}
.col3{
position:absolute;
*position: relative; /*ie7*/
left:200px;
width:100px;
}
.col4{
position:absolute;
*position: relative; /*ie7*/
left:300px;
width:100px;
}
.outer {position:relative}
.inner {
overflow-x:scroll;
overflow-y:visible;
width:500px;
margin-left:400px;
}
<div class="outer">
<div class="inner">
<table>
<tr>
<th class="col1">Header A</th>
<th class="col2">Header A</th>
<th class="col3">Header A</th>
<th class="col4">Header A</th>
<td>col 2 - A (WITH LONGER CONTENT)</td>
<td>col 3 - A</td>
<td>col 4 - A</td>
<td>col 5 - A</td>
<td>col 6 - B</td>
<td>col 7 - B</td>
</tr>
<tr>
<th class="col1">Header B</th>
<th class="col2">Header B</th>
<th class="col3">Header B</th>
<th class="col4">Header B</th>
<td>col 2 - B</td>
<td>col 3 - B</td>
<td>col 4 - B</td>
<td>col 5 - B</td>
<td>col 6 - B</td>
<td>col 7 - B</td>
</tr>
<tr>
<th class="col1">Header C</th>
<th class="col2">Header C</th>
<th class="col3">Header C</th>
<th class="col4">Header C</th>
<td>col 2 - C</td>
<td>col 3 - C</td>
<td>col 4 - C</td>
<td>col 5 - C</td>
<td>col 6 - B</td>
<td>col 7 - B</td>
</tr>
</table>
</div>
</div>
Or jsfiddle:
https://jsfiddle.net/h75zn59o/21/
Note:
position:absolute;
is what causes that first header column to be fixed.
With the original CSS, it's just applied to "th", but using classes (in this example, col1, col2, etc.)
We can assign different fixed positions to different columns.
Because the columns are 100px wide, each following column is positioned another 100px left So, the first one is 0px, then 100px for col2, etc) to avoid overlap with the previous column.