no-cors-fetch-util.html

Enable keyboard shortcuts

<!DOCTYPE html>

<html>

<header>

<script>

const randomStr = Math.random().toString();

window.addEventListener("message", (event) => {

    switch (event.data) {

        case "find":

            // Step 6 (clear-site-data/no-cors-fetch-*.html)

            const did_find = localStorage.getItem(randomStr) != null;

            (window.opener || window.top).postMessage(did_find ? "found" : "missing", "*");

            break;

});

// Step 2 (clear-site-data/no-cors-fetch-*.html)

window.localStorage.setItem(randomStr, randomStr);

(window.opener || window.top).postMessage("set", "*");

</script>

</header>

</html>