LayoutTests/http/tests/security/mixedContent/resources/frame-with-insecure-import.html

<script>
window.onload = function() {
    import("http://127.0.0.1:8080/security/mixedContent/resources/script.js").catch(function (error) {
        if (window.parent)
            window.parent.postMessage(String(error), '*');
    });
};
</script>