function ok(a, msg) { postMessage({ type: "status", status: !!a, msg }); } onmessage = function () { // URL.href throws var url = new URL("http://www.example.com"); ok(url, "URL created"); var status = false; try { url.href = "42"; } catch (e) { status = true; } ok(status, "url.href = 42 should throw"); url.href = "http://www.example.org"; ok(true, "url.href should not throw"); status = false; try { new URL("42"); } catch (e) { status = true; } ok(status, "new URL(42) should throw"); status = false; try { new URL("http://www.example.com", "42"); } catch (e) { status = true; } ok(status, "new URL(something, 42) should throw"); postMessage({ type: "finish" }); };