<!doctype html> <html> <head> <title>document.getElementsByClassName(): adding element with class</title> <script src="/resources/testharness.js"></script> <script src="/resources/testharnessreport.js"></script> </head> <body class="a"> <div id="log"></div> <script> test(function() { var collection = document.getElementsByClassName("a"); var ele = document.createElement("foo"); ele.setAttribute("class", "a"); document.body.appendChild(ele); assert_array_equals(collection, [document.body, ele]); }) </script> </body> </html>