sticky-header.module.css

table.sticky-header thead {
  position: sticky;
  z-index: 500;
  top: var(--drupal-displace-offset-top, 0);
}

File

core/misc/components/sticky-header.module.css

table.sticky-header thead {
  position: sticky;
  z-index: 500;
  top: var(--drupal-displace-offset-top, 0);
}