third_party/WebKit/LayoutTests/fast/dom/StyleSheet/gc-declaration-parent-rule.html

   1 <html>
   2 <head>
   3 <style>
   4 div { color:black }
   5 </style>
   6 <script src="../../../resources/js-test.js"></script>
   7 </head>
   8 <body onload="test()">
   9 <script>
  10 window.jsTestIsAsync = true;
  11 description("Test that CSS rules don't lose custom properties on GC when only reachable through its declarations.");
  12
  13 function test()
  14 {
  15     var sheet = document.styleSheets[0];
  16     style = sheet.cssRules[0].style;
  17     style.parentRule.foo = "bar";
  18     document.getElementsByTagName("head")[0].removeChild(document.getElementsByTagName("style")[0]);
  19     sheet = null;
  20
  21     gc();
  22     setTimeout(function() {
  23         gc();
  24         shouldBe('style.parentRule.foo', '"bar"');
  25         finishJSTest();
  26     }, 0);
  27 }
  28 </script>
  29 <foo id="mystyle" style="display:none">.div { color: white; }</foo>
  30 </body>
  31 </html>