Fixed table head - CSS-only
Simply position: sticky; top: 0; your th elements. (Chrome, FF, Edge)
.tableFixHead { overflow: auto; height: 100px; }
.tableFixHead thead th { position: sticky; top: 0; z-index: 1; }
/* Just common table stuff. Really. */
table { border-collapse: collapse; width: 100%; }
th, td { padding: 8px 16px; }
th { background:#eee; }
<div class="tableFixHead">
<table>
<thead>
<tr><th>TH 1</th><th>TH 2</th></tr>
</thead>
<tbody>
<tr><td>A1</td><td>A2</td></tr>
<tr><td>B1</td><td>B2</td></tr>
<tr><td>C1</td><td>C2</td></tr>
<tr><td>D1</td><td>D2</td></tr>
<tr><td>E1</td><td>E2</td></tr>
</tbody>
</table>
</div>
For both sticky vertical TH and horizontal TH columns (inside TBODY):
.tableFixHead { overflow: auto; height: 100px; width: 240px; }
.tableFixHead thead th { position: sticky; top: 0; z-index: 1; }
.tableFixHead tbody th { position: sticky; left: 0; }
.tableFixHead { overflow: auto; height: 100px; width: 240px; }
.tableFixHead thead th { position: sticky; top: 0; z-index: 1; }
.tableFixHead tbody th { position: sticky; left: 0; }
/* Just common table stuff. Really. */
table { border-collapse: collapse; width: 100%; }
th, td { padding: 8px 16px; white-space: nowrap; }
th { background:#eee; }
<div class="tableFixHead">
<table>
<thead>
<tr><th></th><th>TH 1</th><th>TH 2</th></tr>
</thead>
<tbody>
<tr><th>Foo</th><td>Some long text lorem ipsum</td><td>Dolor sit amet</td></tr>
<tr><th>Bar</th><td>B1</td><td>B2</td></tr>
<tr><th>Baz</th><td>C1</td><td>C2</td></tr>
<tr><th>Fuz</th><td>D1</td><td>D2</td></tr>
<tr><th>Zup</th><td>E1</td><td>E2</td></tr>
</tbody>
</table>
</div>
TH borders problem fix
Since border cannot be painted properly on a translated TH element,
to recreate and render "borders" use the box-shadow property:
/* Borders (if you need them) */
.tableFixHead,
.tableFixHead td {
box-shadow: inset 1px -1px #000;
}
.tableFixHead th {
box-shadow: inset 1px 1px #000, 0 1px #000;
}
.tableFixHead { overflow: auto; height: 100px; }
.tableFixHead thead th { position: sticky; top: 0; z-index: 1; }
/* Just common table stuff. Really. */
table { border-collapse: collapse; width: 100%; }
th, td { padding: 8px 16px; }
th { background:#eee; }
/* Borders (if you need them) */
.tableFixHead,
.tableFixHead td {
box-shadow: inset 1px -1px #000;
}
.tableFixHead th {
box-shadow: inset 1px 1px #000, 0 1px #000;
}
<div class="tableFixHead">
<table>
<thead>
<tr><th>TH 1</th><th>TH 2</th></tr>
</thead>
<tbody>
<tr><td>A1</td><td>A2</td></tr>
<tr><td>B1</td><td>B2</td></tr>
<tr><td>C1</td><td>C2</td></tr>
<tr><td>D1</td><td>D2</td></tr>
<tr><td>E1</td><td>E2</td></tr>
</tbody>
</table>
</div>
TH sticky not working fix
Ensure that parent-elements of "th" element, at least till table element (inclusive), do Not set overflow related styles (e.g. overflow, overflow-x, overflow-y).
For more see stackoverflow.com/Why is 'position: sticky' not working?
Fixed table head - using JavaScript
For ancient browsers, you can use a bit of JS and translateY the th elements
// Fix table head example:
function tableFixHead(evt) {
const el = evt.currentTarget,
sT = el.scrollTop;
el.querySelectorAll("thead th").forEach(th =>
th.style.transform = `translateY(${sT}px)`
);
}
document.querySelectorAll(".tableFixHead").forEach(el =>
el.addEventListener("scroll", tableFixHead)
);
.tableFixHead {
overflow-y: auto;
height: 100px;
}
/* Just common table stuff. */
table {
border-collapse: collapse;
width: 100%;
}
th,
td {
padding: 8px 16px;
}
th {
background: #eee;
}
<div class="tableFixHead">
<table>
<thead>
<tr><th>TH 1</th><th>TH 2</th></tr>
</thead>
<tbody>
<tr><td>A1</td><td>A2</td></tr>
<tr><td>B1</td><td>B2</td></tr>
<tr><td>C1</td><td>C2</td></tr>
<tr><td>D1</td><td>D2</td></tr>
<tr><td>E1</td><td>E2</td></tr>
</tbody>
</table>
</div>
