diff options
Diffstat (limited to 'testing/web-platform/tests/layout-instability/supported-layout-type.html')
| -rw-r--r-- | testing/web-platform/tests/layout-instability/supported-layout-type.html | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/testing/web-platform/tests/layout-instability/supported-layout-type.html b/testing/web-platform/tests/layout-instability/supported-layout-type.html new file mode 100644 index 0000000000..3ba209f50a --- /dev/null +++ b/testing/web-platform/tests/layout-instability/supported-layout-type.html @@ -0,0 +1,18 @@ +<!DOCTYPE html> +<head> +<title>PerformanceObserver.supportedEntryTypes contains "layout-shift"</title> +</head> +<body> +<script src="/resources/testharness.js"></script> +<script src="/resources/testharnessreport.js"></script> +<script> +test(() => { + assert_implements(window.LayoutShift, 'Layout Instability is not supported.'); + assert_implements(typeof PerformanceObserver.supportedEntryTypes !== "undefined", + 'supportedEntryTypes is not supported.'); + assert_greater_than(PerformanceObserver.supportedEntryTypes.indexOf("layout-shift"), -1, + "There should be an entry 'layout-shift' in PerformanceObserver.supportedEntryTypes"); +}, "supportedEntryTypes contains 'layoutShift'."); +</script> +</body> +</html> |