<!DOCTYPE HTML> <html> <!-- https://bugzilla.mozilla.org/show_bug.cgi?id=647518 --> <head> <title>Test for Bug 647518</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=647518">Mozilla Bug 647518</a> <p id="display"></p> <div id="content" style="display: none"> </div> <pre id="test"> <script type="application/javascript"> /** Test for Bug 647518 **/ SimpleTest.waitForExplicitFinish(); var counter = 3; var called = false; var handle1 = window.requestAnimationFrame(function() { called = true; }); ok(handle1 > 0, "Should get back a nonzero handle"); function checker() { --counter; if (counter == 0) { is(called, false, "Canceled callback should not have been called"); SimpleTest.finish(); } else { window.requestAnimationFrame(checker); } } window.requestAnimationFrame(checker); window.cancelAnimationFrame(handle1); </script> </pre> </body> </html>