long-pointerdown.html | Explore in Territory

<!DOCTYPE html>
<head>
    <script src="utils.js"></script>
    <style>
        body {
            width: 200px;
            height: 200px;
        }

        * {
            user-select: none;
        }
    </style>
<body>
    <script>
        document.body.addEventListener("pointerdown", () => {
            busy_wait(120)
        });
        new PerformanceObserver(entries => {
            if (entries.getEntries().some(
                e => e.scripts.some(script => script.invoker === "BODY.onpointerdown"))) {
                window.parent.postMessage("FRAME", "*");
            }
        }).observe({type: "long-animation-frame"});
    </script>
</body>

chromium/third_party/blink/web_tests/external/wpt/long-animation-frame/tentative/resources/long-pointerdown.html