| <!DOCTYPE html> |
| <title>Helper IFrame</title> |
| <script> |
| 'use strict'; |
| |
| async function onLoad() { |
| // Nested Step 5: wpt/web-locks/partitioned-web-locks.tentative.https.html |
| // Load the innermost child iframe and its content. |
| const params = new URLSearchParams(self.location.search); |
| const frame = document.createElement('iframe'); |
| frame.src = params.get('target'); |
| document.body.appendChild(frame); |
| |
| self.addEventListener('message', evt => { |
| // Nested Step 6: wpt/web-locks/partitioned-web-locks.tentative.https.html |
| // Pass any operations request messages to the |
| // innermost child iframe. |
| if (evt.data.op){ |
| // Ensure that the iframe has loaded before passing |
| // on the message. |
| frame.addEventListener('load', function(){ |
| frame.contentWindow.postMessage(evt.data, '*'); |
| }); |
| } |
| // Nested Step 8: wpt/web-locks/partitioned-web-locks.tentative.https.html |
| else { |
| // All other messages, should be sent back to the |
| // top-level site. |
| if (self.opener) |
| self.opener.postMessage(evt.data, '*'); |
| else |
| self.top.postMessage(evt.data, '*'); |
| } |
| }); |
| } |
| self.addEventListener('load', onLoad); |
| </script> |
