MediaWiki:Gadget-stickyTableHeaders.css
Revision as of 19:16, 3 October 2022 by Jacmob (talk | contribs) (Created page with "/* keeps table headers stuck to the top of the window, useful for long tables where it normally scrolls offscreen KNOWN PROBLEMS - borders disappear due to browser implementation issue (https://bugs.webkit.org/show_bug.cgi?id=128486) - double-row headers only work as long as the first <tr> does not stretch its height, since MediaWiki doesn't support <thead> - Safari makes the th elements in <tfoot> scroll down along with the top, if they are made stick...")
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1 /* keeps table headers stuck to the top of the window,
2 useful for long tables where it normally scrolls offscreen
3
4 KNOWN PROBLEMS
5 - borders disappear due to browser implementation issue (https://bugs.webkit.org/show_bug.cgi?id=128486)
6 - double-row headers only work as long as the first <tr> does not stretch its height, since MediaWiki doesn't support <thead>
7 - Safari makes the th elements in <tfoot> scroll down along with the top, if they are made sticky. table > :not(tfoot) fixes this.
8
9 USAGE
10 - sticky headers are opt-in using the "sticky-header" class (eg. {| class="wikitable sticky-header")
11 - IF using multiple rows of <th>, the first row must not exceed 2.3em in height.
12 - If it does, set a custom style="top: 2.4em;" (or something similar) on the second row of <th>
13 - To sticky intermediate headers, mark their table-row as |-class="sticky-header" as well.
14 - Note: This won't look good when the top header is 2 rows high, but the intermediate rows are 1 row high.
15 - don't add sticky headers to tables shorter than roughly 1000px - use your best judgement
16 */
17
18 table.sticky-header > :not(tfoot) tr:first-child th,
19 table.sticky-header > :not(tfoot) tr:nth-child(2) th,
20 tr.sticky-header th {
21 position: -webkit-sticky;
22 position: sticky;
23 height: 2.3em; /* taller contents will override */
24 box-sizing: border-box;
25 top: -1px; /* chrome has a see-through border? */
26 border-bottom: 0;
27 z-index: 1; /* kart maps overlap with the ths: [[Fairy_rings]] */
28 }
29
30 /* Move the second row of sticky headers down exactly the height of a single-line th */
31 table.sticky-header > :not(tfoot) tr:nth-child(2) th {
32 top: calc(2.3em - 1px);
33 }
34
35 /* fake a bottom border - see known problems */
36 table.sticky-header > :not(tfoot) tr:first-child th::after,
37 table.sticky-header > :not(tfoot) tr:nth-child(2) th::after,
38 tr.sticky-header th::after {
39 content: '';
40 position: absolute;
41 left: 0;
42 bottom: -1px; /* merge into existing border */
43 width: 100%;
44 border-bottom: 1px solid var(--wikitable-border);
45 }
46
47 /* dark mode border color */
48 .wgl-darkmode table.sticky-header tr:first-child th::after,
49 .wgl-darkmode table.sticky-header tr:nth-child(2) th::after,
50 .wgl-darkmode tr.sticky-header th::after {
51 border-bottom-color: #172136;
52 }
53
54 /* move down when sticky page header is enabled */
55 .wgl-stickyheader.action-view table.sticky-header tr:first-child th,
56 .wgl-stickyheader.action-view table.sticky-header tr:nth-child(2) th,
57 .wgl-stickyheader.action-view tr.sticky-header th {
58 top: 2.5rem; /* height of sticky header in rem because of template/skin font adjustments */
59 }
60
61 /* Move the second row of sticky headers down exactly the height of a single-line th */
62 .wgl-stickyheader.action-view table.sticky-header tr:nth-child(2) th {
63 top: calc(2.5rem + 2.3em - 1px); /* 2.5rem on top of calc({height} + {top}) w.r.t. previous <th> styles. */
64 }