| <!DOCTYPE html> |
| <script src="../../resources/testharness.js"></script> |
| <script src="../../resources/testharnessreport.js"></script> |
| |
| <style> |
| .spacer { |
| height: 2000px; |
| } |
| .hidden-matchable { |
| content-visibility: hidden-matchable; |
| } |
| </style> |
| |
| <div class="spacer"></div> |
| <div id=hiddendiv class="hidden-matchable"> |
| <div class="spacer"></div> |
| <div id=hiddentext>hiddentext</div> |
| </div> |
| |
| <script> |
| hiddentext.addEventListener('beforematch', () => { |
| setTimeout(() => { |
| hiddendiv.classList.remove('hidden-matchable'); |
| }, 0); |
| }); |
| |
| async_test(t => { |
| testRunner.findString('hiddentext', ['Async']); |
| |
| assert_equals(window.pageYOffset, 0, 'find-in-page scrolling should be async, not sync.'); |
| |
| requestAnimationFrame(t.step_func(() => { |
| requestAnimationFrame(t.step_func_done(() => { |
| // verify hiddentext is scrolled into view |
| const offsetBeforeScroll = window.pageYOffset; |
| hiddentext.scrollIntoView(); |
| const offsetAfterScroll = window.pageYOffset; |
| |
| assert_not_equals(window.pageYOffset, 0, 'find-in-page should scroll after two rAFs.'); |
| assert_equals(offsetAfterScroll, offsetBeforeScroll, |
| `scrollIntoView shouldn't affect the scroll offset because the element should already be scrolled into view.`); |
| })); |
| })); |
| |
| }, 'Verifies that find-in-page wait a frame between firing the beforematch event and scrolling.'); |
| </script> |
