| <!doctype html> |
| <link rel="help" href="https://drafts.csswg.org/cssom-view/#dom-window-devicepixelratio"> |
| <link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1602347"> |
| <link rel="author" href="mailto:emilio@crisal.io" title="Emilio Cobos Álvarez"> |
| <link rel="author" href="https://mozilla.org" title="Mozilla"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <title>window.devicePixelRatio in an undisplayed iframe matches the dpi of the parent document</title> |
| <div style="display: none"> |
| <iframe src="about:blank"></iframe> |
| </div> |
| <script> |
| onload = function() { |
| test(function() { |
| let win = document.querySelector("iframe").contentWindow; |
| assert_equals(win.devicePixelRatio, window.devicePixelRatio, "window.devicePixelRatio in an undisplayed iframe matches the dpi of the parent document"); |
| }); |
| }; |
| </script> |
