intersection-ratio-with-fractional-bounds-in-iframe.html

<!DOCTYPE html>
<html>
<head>
    <script src="/resources/testharness.js"></script>
    <script src="/resources/testharnessreport.js"></script>
    <style>
        body {
            margin: 0;
            padding: 0;
        }
        .iframe-container {
            width: 100%;
            border: 0;
            height: 200px;
        }
    </style>
</head>
<body>
<script>
    const asyncTest = async_test("intersectionRatio in iframe should be 1 for totally visible target with fractional bounds");
    const onIframeObserved = (event) => {
        const ratio = event.detail.intersectionRatio;
        asyncTest.step(() => {
            assert_equals(ratio, 1);
        });
        asyncTest.done();
    };
    window.document.addEventListener("iframeObserved", onIframeObserved, false);
</script>
<iframe class="iframe-container" src="./resources/intersection-ratio-with-fractional-bounds-in-iframe-content.html"></iframe>
</body>
</html>

chromium/third_party/blink/web_tests/external/wpt/intersection-observer/intersection-ratio-with-fractional-bounds-in-iframe.html