| <!DOCTYPE html> |
| <link rel="help" href="https://drafts.csswg.org/css-values-5/#attr-notation"> |
| <link rel="match" href="attr-notype-fallback-ref.html"> |
| <style> |
| #one::after { |
| content: attr(does-not-exist, "Fallback value"); |
| } |
| |
| #two::after { |
| content: attr(does-exist, "Fallback value"); |
| } |
| |
| #three::after { |
| content: attr(does-not-exist, invalid); |
| } |
| |
| #four::after { |
| content: attr(does-exist, invalid); |
| } |
| |
| #five::after { |
| content: attr(does-exist, "Fallback value"); |
| } |
| |
| #six::after { |
| content: attr(does-exist, "Fallback value"); |
| } |
| </style> |
| |
| <div id="one"></div> |
| <div id="two" does-exist="Not fallback value"></div> |
| <div id="three"></div> |
| <div id="four" does-exist="Not fallback value"></div> |
| <div id="five" does-exist=""></div> |
| <div id="six" does-exist></div> |
