|  | <!DOCTYPE html> | 
|  | <meta charset=utf-8> | 
|  | <title>NDEFReader.scan with an focused iframe</title> | 
|  | <link rel="help" href="https://w3c.github.io/web-nfc/"/> | 
|  | <script src="/resources/testharness.js"></script> | 
|  | <script src="/resources/testharnessreport.js"></script> | 
|  | <script src="resources/nfc-helpers.js"></script> | 
|  | <body> | 
|  | <script> | 
|  |  | 
|  | nfc_test(async (t, mockNFC) => { | 
|  | const ndef = new NDEFReader(); | 
|  | const controller = new AbortController(); | 
|  | const ndefWatcher = new EventWatcher(t, ndef, ["reading", "readingerror"]); | 
|  |  | 
|  | const promise = ndefWatcher.wait_for("reading").then(event => { | 
|  | assert_true(event instanceof NDEFReadingEvent); | 
|  | controller.abort(); | 
|  | }); | 
|  | await ndef.scan({ signal: controller.signal }); | 
|  |  | 
|  | const iframe = document.createElement('iframe'); | 
|  | iframe.src = 'resources/support-iframe.html'; | 
|  |  | 
|  | const iframeLoadWatcher = new EventWatcher(t, iframe, 'load'); | 
|  | document.body.appendChild(iframe); | 
|  | await iframeLoadWatcher.wait_for('load'); | 
|  | // Focus on iframe. | 
|  | iframe.contentWindow.document.getElementById('foo').focus(); | 
|  | assert_true(iframe.contentDocument.hasFocus(), 'iframe gains the focus'); | 
|  | // Suspend NFC operations is async in blink, use setTimeout as a workaround. | 
|  | // TODO(wanming.lin@intel.com): find a good way to eliminate this race | 
|  | // condition. | 
|  | await new Promise(resolve => t.step_timeout(resolve, 0)); | 
|  | mockNFC.setReadingMessage(createMessage([createTextRecord(test_text_data)])); | 
|  | await promise; | 
|  |  | 
|  | // Remove iframe from main document. | 
|  | iframe.parentNode.removeChild(iframe); | 
|  | }, 'Test that NDEFReader.scan is not suspended if iframe gains focus.'); | 
|  |  | 
|  | </script> | 
|  | </body> |