| <!doctype html> |
| <meta charset="utf-8"> |
| <title>Content Visibility: relevancy updates</title> |
| <link rel="author" title="Frédéric Wang" href="mailto:[email protected]"> |
| <link rel="help" href="https://drafts.csswg.org/css-contain/#content-visibility"> |
| <link rel="help" href="https://drafts.csswg.org/css-contain/#relevant-to-the-user"> |
| <link rel="help" href="https://drafts.csswg.org/css-contain/#cv-notes"> |
| <meta name="assert" content="Verify relevancy is properly updated for content-visibility: auto elements."> |
| |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| |
| <style> |
| #spacer { |
| height: 300vh; |
| } |
| #contentVisibilityAuto { |
| content-visibility: auto; |
| border: solid; |
| } |
| </style> |
| <div> |
| <div id="log"></div> |
| <div tabindex="1" id="spacer"></div> |
| <div tabindex="2" id="contentVisibilityAuto"> |
| <span>Hello, World!</span> |
| </div> |
| </div> |
| |
| <script> |
| function tick() { |
| return new Promise(r => { |
| requestAnimationFrame(() => requestAnimationFrame(r)); |
| }); |
| } |
| |
| function contentVisibilityAutoElementIsRelevant() { |
| // A content-visibility: auto element that is not relevant skips its contents, |
| // which do not contribute to the result of innerText. |
| return contentVisibilityAuto.innerText.length > 0; |
| } |
| |
| function clearRelevancyReasons() { |
| window.scrollTo(0, 0); |
| spacer.focus({preventScroll: true}); |
| window.getSelection().empty(); |
| } |
| |
| promise_test(async function(t) { |
| // Wait for page load. |
| await new Promise(resolve => { window.addEventListener("load", resolve); }); |
| |
| // Register cleanup method to reset relevancy. |
| t.add_cleanup(clearRelevancyReasons); |
| |
| // Element should initially not be relevant. |
| await tick(); |
| assert_false(contentVisibilityAutoElementIsRelevant(), "initial relevancy"); |
| |
| // Make element close to the viewport. |
| contentVisibilityAuto.firstElementChild.scrollIntoView(); |
| await tick(); |
| assert_true(contentVisibilityAutoElementIsRelevant(), "close to viewport"); |
| |
| // Scroll away from the element again. |
| window.scrollTo(0, 0); |
| await tick(); |
| assert_false(contentVisibilityAutoElementIsRelevant(), "far from viewport"); |
| }, "Relevancy updated after changing proximity to the viewport."); |
| |
| promise_test(async function(t) { |
| // Register cleanup method to reset relevancy. |
| t.add_cleanup(clearRelevancyReasons); |
| |
| // Element should initially not be relevant. |
| await tick(); |
| assert_false(contentVisibilityAutoElementIsRelevant(), "initial relevancy"); |
| |
| // Focus the element. |
| contentVisibilityAuto.focus({preventScroll: true}); |
| await tick(); |
| assert_true(contentVisibilityAutoElementIsRelevant(), "focused"); |
| |
| // Unfocus the element again. |
| spacer.focus({preventScroll: true}); |
| await tick(); |
| assert_false(contentVisibilityAutoElementIsRelevant(), "unfocused"); |
| }, "Relevancy updated after being focused/unfocused."); |
| |
| promise_test(async function(t) { |
| // Register cleanup method to reset relevancy. |
| t.add_cleanup(clearRelevancyReasons); |
| |
| // Element should initially not be relevant. |
| await tick(); |
| assert_false(contentVisibilityAutoElementIsRelevant(), "initial relevancy"); |
| |
| // Select the contents of the element. |
| window.getSelection().selectAllChildren(contentVisibilityAuto); |
| await tick(); |
| assert_true(contentVisibilityAutoElementIsRelevant(), "selected"); |
| |
| // Unselect the contents of the element. |
| window.getSelection().empty(); |
| await tick(); |
| assert_false(contentVisibilityAutoElementIsRelevant(), "unselected"); |
| }, "Relevancy updated after being selected/unselected."); |
| |
| </script> |
