iframe-added-post-activation.html (1982B)
1 <!doctype html> 2 3 <title>iframe added post activation: initiator and prerendered page</title> 4 <script src="/common/get-host-info.sub.js"></script> 5 <script src="/resources/testharness.js"></script> 6 <script src="/resources/testharnessreport.js"></script> 7 <script src="utils.js"></script> 8 <body> 9 <script> 10 11 // When loaded without the "?prerendering" param, this document is called the 12 // "intiator page". It starts a prerender to the same URL, but with the 13 // "?prerendering" param. 14 // 15 // When loaded with the "?prerendering" param, this document is the "prerendered 16 // page". It tells the initiator page when it is ready to activate, and messages 17 // the main test page when it is finished. 18 19 // main() runs the logic of the prerendered page. 20 // 21 // On activation, adds an iframe and tests its document.prerendering state. 22 async function main() { 23 const activated = new Promise((resolve, reject) => { 24 document.addEventListener('prerenderingchange', (e) => { 25 const iframe = document.createElement('iframe'); 26 document.body.appendChild(iframe); 27 resolve(iframe.contentDocument.prerendering) 28 }); 29 }); 30 31 // Ask to activate. 32 const prerenderChannel = new PrerenderChannel('prerender-channel'); 33 prerenderChannel.postMessage('readyToActivate'); 34 35 // Check that document.prerendering is false in the iframe. 36 const iframePrerendering = await activated; 37 assert_true(iframePrerendering === false, 38 'document.prerendering in iframe should be false'); 39 } 40 41 // See comment at the top of this file. 42 const params = new URLSearchParams(location.search); 43 const isPrerendering = params.has('prerendering'); 44 if (!isPrerendering) { 45 loadInitiatorPage(); 46 } else { 47 // For the prerendering page, run main() then message the test page with the 48 // result. 49 const testChannel = new PrerenderChannel('test-channel'); 50 main().then(() => { 51 testChannel.postMessage('PASS'); 52 }).catch((e) => { 53 testChannel.postMessage('FAIL: ' + e); 54 }); 55 } 56 </script> 57 </body>