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- <!DOCTYPE html>
- <script src="../include.js"></script>
- <script>
- asyncTest((done) => {
- const div = document.createElement("div");
- const shadowRoot = div.attachShadow({ mode: "closed" });
- const iframe = document.createElement("iframe");
- window.addEventListener("message", (messageEvent) => {
- println(`Received a message: '${messageEvent.data}'`);
- println(`Was it from the shadow root iframe? ${messageEvent.source === iframe.contentWindow}`);
- done();
- });
- iframe.srcdoc = `
- \u003cscript\u003e
- window.parent.postMessage("Hello from iframe in the shadow root of the just inserted div!");
- \u003c/script\u003e
- `;
- shadowRoot.appendChild(iframe);
- document.body.appendChild(div);
- });
- </script>
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