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Diffstat (limited to '')
| -rw-r--r-- | testing/web-platform/tests/shadow-dom/imperative-slot-fallback-clear.html | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/testing/web-platform/tests/shadow-dom/imperative-slot-fallback-clear.html b/testing/web-platform/tests/shadow-dom/imperative-slot-fallback-clear.html new file mode 100644 index 0000000000..5f79b4f2fa --- /dev/null +++ b/testing/web-platform/tests/shadow-dom/imperative-slot-fallback-clear.html @@ -0,0 +1,35 @@ +<!DOCTYPE html> +<title>Imperative Slot API: fallback should be cleared after slot assignment</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"><span></span></div> + <div id="host2"><span></span></div> +</div> + +<script> +test(() => { + const host = document.getElementById('host1'); + const shadow = host.attachShadow({mode: 'open', slotAssignment: 'manual'}); + shadow.innerHTML = '<slot>fallback</slot>'; + host.offsetHeight; // Force layout + const slot = shadow.firstChild; + slot.assign(host.firstChild); + assert_array_equals(slot.assignedNodes(), [host.firstChild]); + assert_equals(host.offsetHeight, 0, 'Fallback content should not be rendered'); +}, 'Text node fallback should be cleared in a subsequently layout'); + +test(() => { + const host = document.getElementById('host2'); + const shadow = host.attachShadow({mode: 'open', slotAssignment: 'manual'}); + shadow.innerHTML = '<slot><span>fallback</span></slot>'; + host.offsetHeight; // Force layout + const slot = shadow.firstChild; + slot.assign(host.firstChild); + assert_array_equals(slot.assignedNodes(), [host.firstChild]); + assert_equals(host.offsetHeight, 0, 'Fallback content should not be rendered'); +}, 'Element fallback should be cleared in a subsequent layout'); +</script> |