<!DOCTYPE HTML> <html> <!-- https://bugzilla.mozilla.org/show_bug.cgi?id=1065766 --> <head> <meta charset="utf-8"> <title>Test for Bug 1065766</title> <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script> <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/> </head> <body> <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1065766">Mozilla Bug 1065766</a> <div id="content" style="display: none"> <video id="myVideo"></video> </div> <pre id="test"> <script type="application/javascript"> "use strict"; /** * Test for Bug 1065766 * * This test verifies that <video> has 'object-fit:contain' by default, set via * a UA stylesheet. (This is different from the property's initial value, which * is "fill".) * * Spec reference: * https://html.spec.whatwg.org/multipage/rendering.html#video-object-fit */ function checkStyle(elem, expectedVal, message) { is(window.getComputedStyle(elem, "").objectFit, expectedVal, message); } function main() { const videoElem = document.getElementById("myVideo"); checkStyle(videoElem, "contain", "<video> should have 'object-fit:contain' by default"); // Make sure we can override this behavior (i.e. that the UA stylesheet // doesn't use "!important" to make this style mandatory): videoElem.style.objectFit = "cover"; checkStyle(videoElem, "cover", "<video> should honor 'object-fit:cover' in inline style"); } main(); </script> </pre> </body> </html>