<!DOCTYPE HTML> <html> <!-- https://bugzilla.mozilla.org/show_bug.cgi?id=800983 --> <head> <meta charset="utf-8"> <title>Test for Bug 800983</title> <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script> <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/> <style> #display::before { content: "Visible"; display: block } #display { display: inline; margin-top: 0; background: yellow; color: blue; } </style> </head> <body> <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=800983">Mozilla Bug 800983</a> <p id="display"></p> <div id="content" style="display: none"> </div> <pre id="test"> <script type="application/javascript"> /** Test for Bug 800983 **/ var cs = getComputedStyle($("display")); var cs_pseudo = getComputedStyle($("display"), "::before") var cs_default = getDefaultComputedStyle($("display")); var cs_default_pseudo = getDefaultComputedStyle($("display"), "::before"); // Sanity checks for normal computed style is(cs.display, "inline", "We have inline display"); is(cs.marginTop, "0px", "We have 0 margin"); is(cs.backgroundColor, "rgb(255, 255, 0)", "We have yellow background"); is(cs.color, "rgb(0, 0, 255)", "We have blue text"); is(cs_pseudo.content, '"Visible"', "We have some content"); is(cs_pseudo.display, "block", "Our ::before is block"); // And now our actual tests is(cs_default.display, "block", "We have block display by default"); is(cs_default.marginTop, "16px", "We have 16px margin by default"); is(cs_default.backgroundColor, "transparent", "We have transparent background by default"); is(cs_default.color, "rgb(0, 0, 0)", "We have black text by default"); is(cs_default_pseudo.content, "none", "We have no content by default"); is(cs_default_pseudo.display, "inline", "Our ::before is inline by default"); </script> </pre> </body> </html>