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- <!-- This Source Code Form is subject to the terms of the Mozilla Public
- - License, v. 2.0. If a copy of the MPL was not distributed with this
- - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
- <html>
- <body>
- <button id=post>post!</button>
- </body>
- <script>
- window.addEventListener("message", event => {
- console.log("Document message", event, event.data, event.source !== window && event.source === window.parent);
- });
- window.addEventListener("click", event => {
- if (event.target.id === "post") {
- console.log("click!")
- window.parent.postMessage("ping!", "*");
- }
- });
- console.log(window.parent === window)
- </script>
- </html>
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