tor-browser

The Tor Browser
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CSS-supports-L4.html (2977B)

      1 <!doctype html>
      2 <meta charset="utf-8">
      3 <title>CSS.supports() Level 4</title>
      4 <link rel="help" href="https://www.w3.org/TR/css-conditional-4/#the-css-namespace">
      5 <script src="/resources/testharness.js"></script>
      6 <script src="/resources/testharnessreport.js"></script>
      7 <script>
      8  test(function() {
      9    assert_equals(CSS.supports("selector(div)"), true);
     10  }, "selector() function accepts a selector");
     11 
     12  test(function() {
     13    assert_equals(CSS.supports("selector(div, div)"), false);
     14  }, "selector() function doesn't accept a selector list");
     15 
     16  test(function() {
     17    assert_equals(CSS.supports("selector(::-webkit-unknown-pseudo-element)"), false);
     18  }, "selector() function rejects unknown webkit pseudo-elements.");
     19 
     20  test(function() {
     21    assert_equals(CSS.supports("selector(::before)"), true);
     22  }, "selector() function accepts known pseudo-elements");
     23 
     24  test(function() {
     25    assert_equals(CSS.supports("selector(div + .c)"), true);
     26  }, "selector() with simple combinators");
     27 
     28  test(function() {
     29    assert_equals(CSS.supports("selector(div | .c)"), false);
     30  }, "selector() with unknown combinators");
     31 
     32  test(function() {
     33    assert_equals(CSS.supports("selector(:is(:foo))"), false);
     34  }, "selector() with forgiving :is, 1 arg");
     35 
     36  test(function() {
     37    assert_equals(CSS.supports("selector(:is(:foo, div))"), false);
     38  }, "selector() with forgiving :is, multiple args");
     39 
     40  test(function() {
     41    assert_equals(CSS.supports("selector(:where(:foo))"), false);
     42  }, "selector() with forgiving :where, 1 arg");
     43 
     44  test(function() {
     45    assert_equals(CSS.supports("selector(:where(:foo, div))"), false);
     46  }, "selector() with forgiving :where, multiple args");
     47 
     48  test(function() {
     49    assert_equals(CSS.supports("selector(:has(:foo))"), false);
     50  }, "selector() with forgiving :has, 1 arg");
     51 
     52  test(function() {
     53    assert_equals(CSS.supports("selector(:has(:foo, div))"), false);
     54  }, "selector() with forgiving :has, multiple args");
     55 
     56  test(function() {
     57      assert_equals(CSS.supports("selector(:nth-child(2n + 3 of :foo))"), false);
     58  }, "selector() with unforgiving :nth-child, 1 arg");
     59 
     60  test(function() {
     61      assert_equals(CSS.supports("selector(:nth-last-child(2n + 3 of :foo))"), false);
     62  }, "selector() with unforgiving :nth-last-child, 1 arg");
     63 
     64  test(function() {
     65      assert_equals(CSS.supports("selector(:nth-child(2n + 3 of :foo, div))"), false);
     66  }, "selector() with unforgiving :nth-child, multiple args");
     67 
     68  test(function() {
     69      assert_equals(CSS.supports("selector(:nth-last-child(2n + 3 of :foo, div))"), false);
     70  }, "selector() with unforgiving :nth-last-child, multiple args");
     71 
     72  test(function() {
     73      assert_equals(CSS.supports("selector(:nth-child(2n 4))"), false);
     74  }, "selector() with a non-identifier after :nth-child's An+B index");
     75 
     76  test(function() {
     77      assert_equals(CSS.supports("selector(:nth-last-child(2n 4))"), false);
     78  }, "selector() with a non-identifier after :nth-last-child's An+B index");
     79 </script>