| <!DOCTYPE html> |
| <meta charset="utf-8"> |
| <title>A test page that messes with a given SharedArrayBuffer sent from a BroadcastChannel</title> |
| |
| <script> |
| "use strict"; |
| const query = new URLSearchParams(location.search); |
| const channel = new BroadcastChannel(query.get("channel")); |
| const i = Number(query.get("index")); |
| |
| channel.onmessage = e => { |
| const sab = e.data.sab; |
| if (sab === undefined) { |
| // We only care about "broadcasts" from the window |
| return; |
| } |
| |
| const view = new Uint8Array(sab); |
| view[i] = i + 1; |
| channel.postMessage({ i }); |
| }; |
| </script> |
