<!DOCTYPE HTML> <html> <head> <meta charset="utf-8"> <title>Test for overflow events</title> <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script> <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/> <script type="application/javascript"> SimpleTest.waitForExplicitFinish(); window.addEventListener("load", function(event) { if (event.target == document) { test_bug981637(); } }, false); /** Test for Bug 981637: correct overflow event firing in updateOverflow **/ var overflow_fired = false; function overflow_listener(event) { overflow_fired = true; } function test_bug981637() { var outerDiv = document.getElementById("bug981637"); var innerDiv = outerDiv.firstChild; innerDiv.offsetWidth; // flush layout is(overflow_fired, false, "correct setup"); outerDiv.addEventListener("overflow", overflow_listener, false); innerDiv.style.transform = "scale(1.2)"; innerDiv.offsetWidth; // flush layout // run finish step after the overflow event fires (off the event loop) setTimeout(test_bug981637_step2, 0); } function test_bug981637_step2() { is(overflow_fired, true, "overflow event should have fired after updating transform"); SimpleTest.finish(); } </script> </head> <body> <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=981637">Mozilla Bug 981637</a> <div id="bug981637" style="overflow: hidden; width: 100px; height: 100px;"><div style="transform: scale(0.8); width: 100px; height: 100px"></div></div> <pre id="test"> </pre> </body> </html>