gecko-dev/dom/broadcastchannel/tests/iframe_broadcastchannel.html

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<!DOCTYPE HTML>
<html>
<body>
<script type="application/javascript">
function is(a, b, msg) {
ok(a == b, msg);
}
function ok(a, msg) {
window.parent.postMessage({ status: a ? "OK" : "KO", message: msg }, "*");
}
ok("BroadcastChannel" in window, "BroadcastChannel exists");
var bc = new BroadcastChannel("foobar");
ok(bc, "BroadcastChannel can be created");
is(bc.name, "foobar", "BroadcastChannel.name is foobar");
ok("postMessage" in bc, "BroadcastChannel has postMessage() method");
bc.onmessage = function(evt) {
ok(evt instanceof MessageEvent, "evt is a MessageEvent");
is(evt.target, bc, "MessageEvent.target is bc");
is(evt.target.name, "foobar", "MessageEvent.target.name is foobar");
is(evt.target.name, bc.name, "MessageEvent.target.name is bc.name");
is(evt.data, "Hello world from the window!", "Message received from the window");
bc.postMessage("Hello world from the iframe!");
};
</script>
</body>
</html>