| <!DOCTYPE html> |
| <meta charset="utf-8"> |
| <title>CSS Values and Units Test: support for the ex unit</title> |
| <link rel="author" title="Jonathan Kew" href="mailto:jkew@mozilla.com"> |
| <link rel="help" href="https://drafts.csswg.org/css-values-3/#font-relative-lengths"> |
| <link rel="help" href="https://www.w3.org/TR/css-fonts-3/#first-available-font"> |
| <link rel="match" href="reference/ex-unit-004-ref.html"> |
| <meta name="assert" content="The ex unit equals the x-height of the first available font if it has reliable metrics for the x-height."> |
| <style> |
| @font-face { |
| font-family: ExTestNoSpace; |
| src: url(resources/ExTest-NoSpace.woff); |
| } |
| div { |
| height: 10px; |
| background-color: blue; |
| margin-top: 10px; |
| font-size: 80px; |
| width: 10ex; |
| } |
| .test { |
| font-family: ExTestNoSpace, Arial, sans-serif; |
| } |
| .ref { |
| font-family: Arial, sans-serif; |
| } |
| </style> |
| <p>The test passes if there are two blue rectangles of equal length.</p> |
| <!-- ExTest is a font whose OS/2 table's sxHeight field is set to an |
| eighth of the font's units per em, but it does not support the |
| <space> character and therefore is not valid as "first available font" |
| per CSS Fonts, and must NOT be used as the basis of the 'ex' unit. --> |
| <div class="test"></div> |
| <div class="ref"></div> |
