| <!DOCTYPE html> |
| <script src="../resources/testharness.js"></script> |
| <script src="../resources/testharnessreport.js"></script> |
| <div id="host"></div> |
| <div></div> |
| <div></div> |
| <div></div> |
| <div></div> |
| <script> |
| test(() => assert_not_equals(window.internals, undefined, "Needs window.internals for testing."), "Check that window.internals is defined"); |
| |
| var root = host.attachShadow({mode:"open"}); |
| root.innerHTML = "<div></div><div></div><div></div>"; |
| host.offsetTop; |
| |
| test(() => { |
| var sheet = document.createElement("style"); |
| sheet.appendChild(document.createTextNode(` |
| @keyframes unused { |
| from { color: pink } |
| to { color: orange } |
| }`)); |
| root.appendChild(sheet); |
| assert_equals(internals.updateStyleAndReturnAffectedElementCount(), 1, |
| "Recalc for shadow tree, including host and inserted style element."); |
| }, "Check that adding @keyframes does not cause a style recalc of the host element when no animations are running."); |
| </script> |
