| <!DOCTYPE html> | |
| <meta charset="UTF-8"> | |
| <title>CSS Containment Test: 'contain: style' and counter (with 'display: contents')</title> | |
| <link rel="help" href="https://www.w3.org/TR/css-contain-1/#containment-style"> | |
| <link rel="match" href="reference/contain-style-counters-001-ref.html"> | |
| <meta content="This test checks that when an element has 'contain: style', then counters which may be affecting its subtree are reset to 0 for such scope. In this test, the div#test does not generate a principal box because of 'display: contents'. Despite that particular condition, 'contain: style' will have an effect on div#test." name="assert"> | |
| <meta name="flags" content=""> | |
| <style> | |
| div#create-counter | |
| { | |
| counter-reset: counter-of-span 9; | |
| } | |
| /* | |
| This creates a new counter identified as "counter-of-span" | |
| and initially sets such counter to 9 (an entirely | |
| arbitrary number). | |
| */ | |
| div#test | |
| { | |
| contain: style; | |
| display: contents; | |
| font-size: 3em; | |
| } | |
| /* | |
| Other types of containment (size, layout, paint) have no | |
| effect on box that do not generate a principal box which | |
| is the case here with div#test because of 'display: contents'. | |
| But in this test, 'contain: style' will apply and will | |
| have a rendering effect on the counter. | |
| */ | |
| div#test span | |
| { | |
| counter-increment: counter-of-span 5; | |
| } | |
| /* | |
| This increments the counter identified as "counter-of-span" | |
| of the step value of 5 (an entirely arbitrary number) each | |
| and every time there is a <span> descendant within the subtree | |
| of div#test | |
| */ | |
| div#test span::after | |
| { | |
| content: counter(counter-of-span); | |
| } | |
| /* | |
| Now, the generated content after the span is set to the | |
| current value of the counter identified as "counter-of-span" | |
| */ | |
| </style> | |
| <p>Test passes if there is the digit 5. | |
| <div id="create-counter"></div> | |
| <div id="test"><span></span></div> |