ch-unit-017.html (1115B)
1 <!DOCTYPE html> 2 <meta charset="utf-8"> 3 <title>CSS Values and Units Test: support for the ch unit</title> 4 <link rel="author" title="Cameron McCormack" href="mailto:cam@mcc.id.au"> 5 <link rel="help" href="https://drafts.csswg.org/css-values-3/#font-relative-lengths"> 6 <link rel="match" href="reference/ch-unit-016-ref.html"> 7 <meta name="assert" content="In vertical upright writing modes, the ch unit is equal to the vertical advance of the zero glyph."> 8 <style> 9 @font-face { 10 font-family: ChTestShortZero; 11 src: url(resources/ChTestShortZero.woff); 12 } 13 div { 14 height: 10px; 15 background-color: blue; 16 margin-top: 10px; 17 } 18 .test { 19 writing-mode: vertical-rl; 20 text-orientation: upright; 21 width: 5ch; 22 } 23 .ref { 24 width: 100px; 25 } 26 </style> 27 <p>The test passes if there are two blue rectangles of equal length.</p> 28 <!-- ChTestShortZero has a '0' glyph whose vertical advance is a quarter 29 of the units per em, so ch units in vertical upright writing modes 30 should compute to 0.25em, resulting in the div being 100px width. --> 31 <div class="test" style="font: 80px ChTestShortZero;"></div> 32 <div class="ref"></div>