html: hover table column [duplicate]

Answer 1

Only works for cells or rows, sorry. e.g.

td {
  background-color: blue;
}

td:hover {
  background-color: red;
}

There are JavaScript solutions available but nothing in CSS right now will do what you want because of the limitations of selectors.

td  /* all cells */
{ 
  background-color: blue;
}

tr /* all rows */
{
  background-color: pink;
}

/* nothing for all columns */