View source for MediaWiki:Sticky header/StickyTableHeadersFix.css

/**
 * Makes table headers sticky on small screens for [[Template:Sticky header]]
 * and [[MediaWiki:Gadget-StickyTableHeaders.css]].
 * 
 * See documentation:
 * {@link https://en.wikipedia.org/wiki/User:Jroberson108/StickyTableHeadersFix}
 */

/**
 * Apply [[Template:Sticky header/styles.css]] to smaller screens.
 */
@media screen and (max-width: 639px) {
  /**
   * Make top sticky.
   */
  .sticky-header > thead > tr:first-child,
  .sticky-header > caption + tbody > tr:first-child,
  .sticky-header > tbody:first-child > tr:first-child,
  .sticky-header-multi > thead {
    position: sticky; /* Was "static". */
    top: 0;
    z-index: 10;
  }
  /* Timeless overflowed tables not sticky. */
  body.skin-timeless .content-table-wrapper.overflowed .sticky-header > thead > tr:first-child,
  body.skin-timeless .content-table-wrapper.overflowed .sticky-header > caption + tbody > tr:first-child,
  body.skin-timeless .content-table-wrapper.overflowed .sticky-header > tbody:first-child > tr:first-child,
  body.skin-timeless .content-table-wrapper.overflowed .sticky-header-multi > thead {
    position: static; /* Reset to prior. */
  }

  /**
   * Fix scrolling data shows through sticky's transparent background.
   */
  /* Plain table headers. */
  .sticky-header:not(.wikitable),
  .sticky-header-multi:not(.wikitable) {
    background-color: var(--color-inverted, #fff);
  }
  /* Plain table headers. */
  .sticky-header:not(.wikitable) > *, /* For thead, tbody. */
  .sticky-header:not(.wikitable) > thead > tr:first-child,
  .sticky-header:not(.wikitable) > caption + tbody > tr:first-child,
  .sticky-header:not(.wikitable) > tbody:first-child > tr:first-child,
  .sticky-header-multi:not(.wikitable) > thead,
  /* Wikitable and plain table .sorttop rows after sort. */
  .sticky-header-multi > thead {
    background-color: inherit;
  }

  /**
   * Fix missing borders due to sticky position and wikitable collapsed borders.
   * https://bugs.webkit.org/show_bug.cgi?id=128486
   *
   * Skip rare plain table separated borders, which sometimes shows scrolling
   * data through sticky's 2px "border-spacing".
   *
   * Skip very rare Timeless plain table ".mw-datatable" collapsed boarders.
   */
  .sticky-header.wikitable,
  .sticky-header-multi.wikitable {
    border-collapse: separate; /* Was "collapse". */
    border-spacing: 0;
    border-width: 0 1px 1px 0;
  }
  .sticky-header.wikitable td,
  .sticky-header.wikitable th,
  .sticky-header-multi.wikitable td,
  .sticky-header-multi.wikitable th {
    border-width: 1px 0 0 1px;
  }
  body.skin-timeless .content-table-wrapper:not(.overflowed) .sticky-header.wikitable,
  body.skin-timeless .content-table-wrapper:not(.overflowed) .sticky-header-multi.wikitable {
    border-bottom-width: 0.2em;
    padding: 0;
  }
  /* Adjust {{static row numbers}} borders. */
  .sticky-header.static-row-numbers.wikitable tr::before,
  .sticky-header-multi.static-row-numbers.wikitable tr::before {
    border-left-width: 1px;
  }
  .sticky-header.static-row-numbers.wikitable > thead > tr:first-child::before,
  .sticky-header.static-row-numbers.wikitable > caption + tbody > tr:first-child::before,
  .sticky-header.static-row-numbers.wikitable > tbody:first-child > tr:first-child::before,
  .sticky-header-multi.static-row-numbers.wikitable > thead > tr:first-child::before,
  .sticky-header-multi.static-row-numbers.wikitable > caption + tbody > tr:first-child::before,
  .sticky-header-multi.static-row-numbers.wikitable > tbody:first-child > tr:first-child::before,
  /* Sortbotton #1: all. When supported, consolidate #1-2 to tr:nth-child(1 of .sortbottom)::before */
  .sticky-header.static-row-numbers.wikitable .sortbottom::before,
  .sticky-header-multi.static-row-numbers.wikitable .sortbottom::before {
    border-top-width: 1px;
  }
  /* Sortbottom #2: all minus 1st. */
  .sticky-header.static-row-numbers.wikitable .sortbottom ~ .sortbottom::before,
  .sticky-header-multi.static-row-numbers.wikitable .sortbottom ~ .sortbottom::before {
    border-top-width: 0;
  }
  /* After sort, "tbody:first-of-type" targets "tbody>tr:first-child". */
  .sticky-header.static-row-numbers.wikitable > tbody:first-of-type > tr:not(.static-row-header)::before,
  .sticky-header-multi.static-row-numbers.wikitable > tbody:first-of-type > tr:not(.static-row-header)::before {
    border-bottom-width: 0;
    border-right-width: 0;
  }
  /* Timeless overflowed tables not sticky. */
  body.skin-timeless .content-table-wrapper.overflowed .sticky-header.wikitable,
  body.skin-timeless .content-table-wrapper.overflowed .sticky-header-multi.wikitable {
    border-collapse: collapse; /* Reset to prior. */
    border-width: 1px; /* Reset to prior. */
  }
}

/**
 * For small screens, override global CSS so sticky tables works.
 *
 * Issues on all targeted skins <=639px wide:
 * - Windows and Android: when sticky table wider than main content area, table
 *   overflowed and its horizontal scroll replaced with page-level, which
 *   messes up page layout.
 * - Android (some): zoom out for sticky to work causing readability issues.
 * - iPhone: no known issues.
 */
@media screen and (max-width: 639px) {
  body:not(.skin-timeless) .sticky-header,
  body:not(.skin-timeless) .sticky-header-multi,
  body:not(.skin-timeless) .jquery-tablesorter,
  body:not(.skin-timeless) .mw-sticky-header {
    display: table; /* Was "block". */
  }
  body.skin-minerva .sticky-header > caption,
  body.skin-minerva .sticky-header-multi > caption,
  body.skin-minerva .jquery-tablesorter > caption,
  body.skin-minerva .mw-sticky-header > caption {
    display: table-caption; /* Was "block". */
  }
}