load.fetchpriority_attr, fetchpriority);
            const el = document.createElement("script");
            el.src = preload.url;
            el.onload = () => {
                const name = new URL(preload.url, window.location);
                assert_true(isPreloadedByEarlyHints(name));
                resolve();
            };
            el.onerror = reject;
            document.body.appendChild(el);
        });
    }, `fetchpriority='${fetchpriority}' in early hints preload headers does cause not any