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