| <!DOCTYPE html> |
| <title>Imperative Slot API: intial fallback should be correctly set up</title> |
| <link rel="author" href="mailto:xiaochengh@chromium.org"> |
| <link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=1292292"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| |
| <div> |
| <div id="host1"></div> |
| <div id="host2"></div> |
| </div> |
| |
| <script> |
| test(() => { |
| const host = document.getElementById('host1'); |
| const shadow = host.attachShadow({mode: 'open', slotAssignment: 'manual'}); |
| shadow.innerHTML = '<slot>fallback</slot>'; |
| const slot = shadow.firstChild; |
| assert_array_equals(slot.assignedNodes(), []); |
| assert_greater_than(host.offsetHeight, 0, 'Fallback content should be rendered'); |
| }, 'Unassigned imperative slot can render text node as the initial fallback'); |
| |
| test(() => { |
| const host = document.getElementById('host2'); |
| const shadow = host.attachShadow({mode: 'open', slotAssignment: 'manual'}); |
| shadow.innerHTML = '<slot><span>fallback</span></slot>'; |
| const slot = shadow.firstChild; |
| assert_array_equals(slot.assignedNodes(), []); |
| assert_greater_than(host.offsetHeight, 0, 'Fallback content should be rendered'); |
| }, 'Unassigned imperative slot can render element as the initial fallback'); |
| </script> |
