| <!doctype HTML> |
| <html> |
| <meta charset="utf8"> |
| <title>Content Visibility: containment added</title> |
| <link rel="author" title="Rakina Zata Amni" href="mailto:rakina@chromium.org"> |
| <link rel="help" href="https://drafts.csswg.org/css-contain/#content-visibility"> |
| <meta name="assert" content="content-visibility visible does not add containment"> |
| <meta name="assert" content="content-visibility hidden adds containment"> |
| <meta name="assert" content="content-visibility auto adds containment"> |
| <meta name="assert" content="content-visibility auto visibility switches after rAF callbacks of the frame that produces the painted output"> |
| |
| <style> |
| .auto { |
| content-visibility: auto; |
| } |
| .hidden { |
| content-visibility: hidden; |
| } |
| </style> |
| <div id="container"></div> |
| <div id="async_container"></div> |
| |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| |
| <script> |
| function setUp(container) { |
| container.style = ""; |
| container.classList = ""; |
| assert_equals(getComputedStyle(container).contain, "none"); |
| } |
| |
| test(() => { |
| setUp(container); |
| container.classList.add("hidden"); |
| assert_equals(getComputedStyle(container).contain, "size layout style paint"); |
| }, "content-visibility: hidden adds contain: size layout style;"); |
| |
| async_test((t) => { |
| setUp(async_container); |
| async_container.classList.add("auto"); |
| t.step(() => assert_equals(getComputedStyle(async_container).contain, "size layout style paint")); |
| // Considering this as frame 1: |
| // At frame 2, the container has size-containment, and intersection |
| // observations will be delivered at the end of that frame. |
| // At frame 3, the container still has size-containment, because visiblility |
| // switch happens after rAF-callbacks have run. |
| // At frame 4, the container is no longer size-contained since it is visible. |
| requestAnimationFrame(() => { |
| // Frame 2 checks: |
| t.step(() => assert_equals(getComputedStyle(async_container).contain, "size layout style paint")); |
| |
| requestAnimationFrame(() => { |
| // Frame 3 checks: |
| t.step(() => assert_equals(getComputedStyle(async_container).contain, "size layout style paint")); |
| |
| requestAnimationFrame(() => { |
| // Frame 4 checks: |
| t.step(() => assert_equals(getComputedStyle(async_container).contain, "layout style paint")); |
| t.done(); |
| }); |
| }); |
| }); |
| }, "content-visibility: auto adds contain: size layout style paint;"); |
| |
| test(() => { |
| setUp(container); |
| container.classList.add("auto"); |
| container.style = "contain: style;"; |
| assert_equals(getComputedStyle(container).contain, "size layout style paint"); |
| container.style = "contain: style layout;"; |
| assert_equals(getComputedStyle(container).contain, "size layout style paint"); |
| container.style = ""; |
| assert_equals(getComputedStyle(container).contain, "size layout style paint"); |
| }, "content-visibility: auto adds contain: size layout style paint, can't be overridden"); |
| |
| test(() => { |
| setUp(container); |
| container.classList.add("auto"); |
| container.style = "contain: paint;"; |
| assert_equals(getComputedStyle(container).contain, "size layout style paint"); |
| container.style = "contain: strict;"; |
| assert_equals(getComputedStyle(container).contain, "size layout style paint"); |
| container.style = "contain: content;"; |
| assert_equals(getComputedStyle(container).contain, "size layout style paint"); |
| }, "content-visibility keeps all containment even when shorthands are specified"); |
| </script> |
