1import { sendWasmModule } from "./helpers.mjs";
2
3// This is done for the window.open() case. For <iframe>s we use the
4// <iframe> element's load event instead.
5const usp = new URLSearchParams(location.search);
6if (usp.has("send-loaded-message")) {
7  opener.postMessage("loaded", "*");
8}
9
10window.onmessage = async (e) => {
11  // These could come from the parent, opener, or siblings.
12  if (e.data.constructor === WebAssembly.Module) {
13    e.source.postMessage("WebAssembly.Module message received", "*");
14  }
15
16  // These could come from the parent or opener.
17  if (e.data.command === "set document.domain") {
18    document.domain = e.data.newDocumentDomain;
19    e.source.postMessage("document.domain is set", "*");
20  } else if (e.data.command === "get originAgentCluster") {
21    e.source.postMessage(self.originAgentCluster, "*");
22  }
23
24  // These only come from the parent.
25  if (e.data.command === "send WASM module") {
26    const destinationFrameWindow = parent.frames[e.data.indexIntoParentFrameOfDestination];
27    const whatHappened = await sendWasmModule(destinationFrameWindow);
28    parent.postMessage(whatHappened, "*");
29  } else if (e.data.command === "access document") {
30    const destinationFrameWindow = parent.frames[e.data.indexIntoParentFrameOfDestination];
31    try {
32      destinationFrameWindow.document;
33      parent.postMessage("accessed document successfully", "*");
34    } catch (e) {
35      parent.postMessage(e.name, "*");
36    }
37  } else if (e.data.command === "access location.href") {
38    const destinationFrameWindow = parent.frames[e.data.indexIntoParentFrameOfDestination];
39    try {
40      destinationFrameWindow.location.href;
41      parent.postMessage("accessed location.href successfully", "*");
42    } catch (e) {
43      parent.postMessage(e.name, "*");
44    }
45  } else if (e.data.command === "access frameElement") {
46    if (frameElement === null) {
47      parent.postMessage("null", "*");
48    } else if (frameElement?.constructor?.name === "HTMLIFrameElement") {
49      parent.postMessage("frameElement accessed successfully", "*");
50    } else {
51      parent.postMessage("something wierd happened", "*");
52    }
53  }
54
55  // We could also receive e.data === "WebAssembly.Module message received",
56  // but that's handled by await sendWasmModule() above.
57};
58
59window.onmessageerror = e => {
60  e.source.postMessage("messageerror", "*");
61};
62
63document.body.textContent = location.href;
64