<!DOCTYPE HTML> <html> <!-- https://bugzilla.mozilla.org/show_bug.cgi?id=254337 --> <head> <title>Test for Bug 254337</title> <script type="text/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=254337">Mozilla Bug 254337</a> <p id="display"></p> <div id="content" style="display: none"> </div> <pre id="test"> <script class="testbody" type="text/javascript"> /** Test for Bug 254337 **/ var el = document.createElement("div"); el.setAttribute("class", "foobar1"); is(el.className, "foobar1", "Wrong className!"); el.className += " foobar2 "; is(el.className, "foobar1 foobar2 ", "Appending to className didn't work!"); el.className += "foobar3"; is(el.className, "foobar1 foobar2 foobar3", "Appending to className didn't work!"); var el = document.createElement("div"); el.setAttribute("class", " foobar1 "); is(el.className, " foobar1 ", "Wrong className!"); el.className += "foobar2"; is(el.className, " foobar1 foobar2", "Appending to className didn't work!"); el.setAttribute("class", " "); is(el.getAttribute("class"), " ", "class attribute didn't store the right value!"); </script> </pre> </body> </html>