<!DOCTYPE html> <body> <script src="/resources/testharness.js"></script> <script src="/resources/testharnessreport.js"></script> <script> promise_test(async t => { let nextMessageEvent = new Promise((resolve, reject) => { window.addEventListener('message', e => resolve(e)); window.addEventListener('messageerror', e => resolve(e)); }); let w = window.open('https://{{hosts[][]}}:{{ports[https][0]}}/webmessaging/resources/post-cryptokey-to-opener.html'); try { let event = await nextMessageEvent; assert_equals(event.type, 'messageerror'); } finally { w.close(); } }, "insecure context should not receive an object for secure contexts only"); </script> </body>