Ensure that both the top row and leftmost column are fixed in a vertical header using JQuery DataTable

Check out the implementation of vertical header flow in Datatables by visiting: https://jsfiddle.net/2unr54zc/

While I have successfully fixed the columns on horizontal scroll, I'm facing difficulty in fixing the first two rows when vertically scrolled due to them being in different TDs/THs on different TRs.

Any suggestions on how to achieve this would be greatly appreciated.

Here is the code snippet provided:

.dataTable {
  display: block;
  width: 100%;
}
.dataTable thead {
  display: block;
  position: relative;
}
.dataTable thead tr {
  display: flex;
}
...
...
... // script and table code here
</script>

Answer №1

The issue lies within the box-sizing property applied to th and td.

There are two conflicting sources for the box-sizing value: your custom CSS and the datatables.min.css.

In the datatables.min.css file:

table.dataTable, table.dataTable th, table.dataTable td {
    -webkit-box-sizing: content-box;
    box-sizing: content-box;
}

In your custom CSS:

.dataTable thead th {
  box-sizing: border-box;
  /* other properties */
}
.dataTable tbody td {
  box-sizing: border-box;
  /* other properties */
}

Both selectors table.dataTable th and .dataTable thead th have the same level of specificity. This means that the order of styles in the cascade determines the final value of box-sizing.

In the provided example, the custom CSS is placed after the datatables.min.css, causing the conflict. To resolve this, ensure that your custom CSS is ordered lower in your code, or make the selector more specific.

In the modified example below, a .vertical class is added to increase the specificity of the custom CSS, making the styles independent of order.

Additionally, check the following code snippet:

// Sample Code Goes Here

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