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|   1 <!DOCTYPE html> |  | 
|   2 <title>Fullscreen UA style sheet removes iframe border</title> |  | 
|   3 <script src="../../resources/testharness.js"></script> |  | 
|   4 <script src="../../resources/testharnessreport.js"></script> |  | 
|   5 <script src="../trusted-event.js"></script> |  | 
|   6 <div id="log"></div> |  | 
|   7 <iframe></iframe> |  | 
|   8 <script> |  | 
|   9 async_test(function() |  | 
|  10 { |  | 
|  11     var iframe = document.querySelector("iframe"); |  | 
|  12  |  | 
|  13     // The HTML UA style sheet gives iframe a border. |  | 
|  14     // https://html.spec.whatwg.org/#embedded-content-rendering-rules |  | 
|  15     assert_equals(getComputedStyle(iframe).borderStyle, "inset"); |  | 
|  16  |  | 
|  17     document.addEventListener("fullscreenchange", this.step_func_done(function() |  | 
|  18     { |  | 
|  19         // The Fullscreen UA style sheet removes the iframe border. |  | 
|  20         assert_equals(getComputedStyle(iframe).borderStyle, "none"); |  | 
|  21     })); |  | 
|  22  |  | 
|  23     trusted_request(iframe); |  | 
|  24 }); |  | 
|  25 </script> |  | 
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