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contain-content-011.html (2047B)

      1 <!DOCTYPE html>
      2 
      3  <meta charset="UTF-8">
      4 
      5  <title>CSS Containment Test: 'contain: content' does not turn on style containment</title>
      6 
      7  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/">
      8  <link rel="help" href="https://drafts.csswg.org/css-contain/#contain-property">
      9  <link rel="match" href="reference/contain-content-011-ref.html">
     10 
     11  <meta name="assert" content="'contain: content' turns on style containment. So, in this test, the counter of div.abspos child should not be reset and must not be reset.">
     12 
     13  <style>
     14  body
     15    {
     16      counter-reset: counter-of-abspos-div 17;
     17    }
     18 
     19    /*
     20    This creates a new counter identified as
     21    "counter-of-abspos-div" and initially sets
     22    such counter to 17 (an entirely arbitrary
     23    number)
     24    */
     25 
     26  div
     27    {
     28      width: 100px;
     29    }
     30 
     31 
     32  div#contain-content
     33    {
     34      background-color: red;
     35      contain: content;
     36      height: 100px;
     37    }
     38 
     39  div.abspos
     40    {
     41      background-color: green;
     42      height: 50px;
     43      position: absolute;
     44      right: 0;
     45    }
     46 
     47  div#contain-content > div.abspos
     48    {
     49      counter-increment: counter-of-abspos-div 4;
     50    }
     51 
     52    /*
     53    This increments the counter identified as
     54    "counter-of-abspos-div" of the step value
     55    of 4 (an entirely arbitrary number) each and
     56    every time there is a div.abspos child
     57    within the subtree of div#contain-content
     58    */
     59 
     60  div#first-abspos
     61    {
     62      top: 0px;
     63    }
     64 
     65  div#second-abspos
     66    {
     67      bottom: 0px;
     68    }
     69 
     70  div#result::after
     71    {
     72      content: counter(counter-of-abspos-div);
     73      font-size: 3em;
     74    }
     75 
     76    /*
     77    Now, the generated content is set to the
     78    current value of the counter identified
     79    as "counter-of-abspos-div":
     80    17 + 4 * 2 == 25
     81    */
     82  </style>
     83 
     84  <body>
     85 
     86  <p>Test passes if there is a filled green square, no red and the number 17.
     87 
     88  <div id="contain-content">
     89    <div id="first-abspos" class="abspos"></div>
     90    <div id="second-abspos" class="abspos"></div>
     91  </div>
     92 
     93  <div id="result"></div>