| <!DOCTYPE html> |
| <script src="../../resources/testharness.js"></script> |
| <script src="../../resources/testharnessreport.js"></script> |
| <iframe id="ifr" width="50" height="40" style="display: none" srcdoc="x"></iframe> |
| <script> |
| |
| var test = async_test("iframe fires resize event when displayed"); |
| var raf = requestAnimationFrame; |
| var raf2 = (f) => { raf(() => { raf(f); })} |
| var innerWindow = ifr.contentWindow; |
| var width = 0; |
| var height = 0; |
| |
| onload = () => { |
| // Add event listener after the srcdoc has been loaded, but before it is displayed. |
| innerWindow.onresize = () => { |
| width = innerWindow.innerWidth; |
| height = innerWindow.innerHeight; |
| }; |
| |
| raf2(() => { |
| assert_true(innerWindow.innerWidth == 0); |
| assert_true(innerWindow.innerHeight == 0); |
| |
| // Displaying the iframe changes its viewport from 0x0 to 50x40. |
| // This should fire a resize event. |
| ifr.style.display = "block"; |
| |
| raf2(() => { |
| test.step(() => { |
| assert_true(width == 50); |
| assert_true(height == 40); |
| }); |
| test.done(); |
| }); |
| }); |
| }; |
| |
| </script> |
