devicePixelRatio-undisplayed-iframe.tentative.html (899B)
1 <!doctype html> 2 <link rel="help" href="https://drafts.csswg.org/cssom-view/#dom-window-devicepixelratio"> 3 <link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1602347"> 4 <link rel="author" href="mailto:emilio@crisal.io" title="Emilio Cobos Álvarez"> 5 <link rel="author" href="https://mozilla.org" title="Mozilla"> 6 <script src="/resources/testharness.js"></script> 7 <script src="/resources/testharnessreport.js"></script> 8 <title>window.devicePixelRatio in an undisplayed iframe matches the dpi of the parent document</title> 9 <div style="display: none"> 10 <iframe src="about:blank"></iframe> 11 </div> 12 <script> 13 onload = function() { 14 test(function() { 15 let win = document.querySelector("iframe").contentWindow; 16 assert_equals(win.devicePixelRatio, window.devicePixelRatio, "window.devicePixelRatio in an undisplayed iframe matches the dpi of the parent document"); 17 }); 18 }; 19 </script>