编辑“Template:Diagonal split header/doc”

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== Usage ==
This template simulates a table header cell split diagonally, a device often used to compactly label headers of rows and columns, as in this example:
{| class="wikitable" style="margin:0 auto;text-align:center;"
! {{Diagonal split header|From|To}} !! Solid !! Liquid !! Gas
|-
! Solid
| Solid-solid transformation || Melting || Sublimation
|-
! Liquid
| Freezing || &mdash; || Boiling/evaporation
|-
! Gas
| Deposition || Condensation || &mdash;
|}

To use it, create a header cell using <code>!</code> followed by <code><nowiki>{{diagonal split header|NATURE-OF-ROW-HEADERS|NATURE-OF-COLUMN-HEADERS}}</nowiki></code>.

As the effect is achieved by drawing a diagonal line across the cell, the two headers are still part of the same cell and can easily overrun the line. A remedy is to pad the headers with non-breaking spaces (<code>&amp;nbsp;</code>), line breaks (<code>&lt;br /&gt;</code>), and/or CSS (escape <code>=</code> signs as <code><nowiki>{{=}}</nowiki></code>), as in the example above. The template user is responsible for checking that it does not overrun on common Web browsers.

=== Spanning columns and rows, and collapsible and sortable tables ===
The template is compatible with collapsible tables, and cells using colspan or rowspan, in which case place the colspan/rowspan attribute between <code>!</code> and <code><nowiki>{{Diagonal split header ...}}</nowiki></code>. It is not compatible with sortable tables, as the sort arrows are not drawn, but this problem can be resolved by using a second header row:

{| class="wikitable sortable mw-collapsible" style="margin:0 auto;text-align:center;"
! colspan="2" rowspan="2" {{Diagonal split header|&nbsp; City|''n''}} !!{{#expr:{{CURRENTYEAR}} - 1}} !!  colspan="2"|{{CURRENTYEAR}}&nbsp;
|-
! Dec !! Jan !! Feb
|-
! Roma !! Rome
| 8 || 1 || 6
|-
! Venezia !! Venice
| 3 || 5 || 7
|-
! Firenze !! Florence
| 4 || 9 || 2
|}
== Template data ==

{| class="wikitable"
! #
! Label
! Description
! Example
! Type
! Required
|-
| 1
| Rows
| Header of row headers, shown on the bottom left
| ''Y-axis''
| string
| true
|-
| 2
| Columns
| Header of column headers, shown on the top right
| ''X-axis''
| string
| true
|-
| 3
| Background colour
| Optional colour of background, use <code>transparent</code> for standard non-header background. Default = #eaecf0
| transparent
| string
| false
|}
 
== See also ==
* [https://en.wikipedia.org/wiki/Template:Diagonal_split_header Template:Diagonal split header on Wikipedia]