<!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:[email protected]" 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>
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