| <!doctype html><!-- webkit-test-runner [ UsesBackForwardCache=true ] --> |
| <html> |
| <script> |
| |
| let suspended = false; |
| let restored = false; |
| |
| function finish(msg) |
| { |
| document.getElementById("result").textContent = msg; |
| if (window.testRunner) |
| testRunner.notifyDone(); |
| } |
| |
| window.addEventListener("pagehide", event => { |
| suspended = event.persisted; |
| if (!suspended) |
| finish("FAIL: event.persisted was false for pagehide event.") |
| }); |
| |
| window.addEventListener("pageshow", event => { |
| // If we haven't been suspended, then this is the initial page load, not the back navigation. |
| if (!suspended) |
| return; |
| |
| restored = event.persisted; |
| if (!restored) |
| finish("FAIL: event.persisted was false for pageshow event.") |
| }); |
| |
| window.addEventListener("DOMContentLoaded", event => { |
| if (window.testRunner) { |
| testRunner.dumpAsText(); |
| testRunner.waitUntilDone(); |
| } |
| |
| // We start an animation that is just long enough that it would finish while the page is hidden. |
| document.body.animate({ backgroundColor: "red" }, 500).finished.then(() => { |
| if (!suspended) |
| finish("FAIL: Animation finished but prevented the page from being suspended."); |
| else if (!restored) |
| finish("FAIL: Animation finished but prevented the page from being restored."); |
| else |
| finish("PASS."); |
| }); |
| |
| requestAnimationFrame(() => { |
| // Load a new page, and let it go back after 250ms. |
| window.location.href = "data:text/html,<body onload='setTimeout(() => history.back(), 250)'></body>"; |
| }); |
| }); |
| |
| </script> |
| <body> |
| This test verifies that the page cache suspends and resumes Web Animations from the page cache. The test starts an animation, then navigates away, waits a bit, navigates back, confirming that the timeline froze at a given time and resumed in the same spot, advancing the animation. If successful, it outputs 'PASS' below. |
| <div id="result"></div> |
| </body> |
| </html> |
