child_message.html | Explore in Territory

<!doctype html>
<script src="/resources/channel.sub.js"></script>
<script>
function handleMessage(msg) {
    // We expect the message to be a SendChannel
    respChannel = msg;
    respChannel.send("PASS");
}

let channel = global_channel();
channel.addMessageHandler(handleMessage);
channel.connect();
</script>

chromium/third_party/blink/web_tests/external/wpt/infrastructure/channels/child_message.html