ladybird/Userland/Libraries/LibWeb/HTML/MessagePort.idl

#import <DOM/EventTarget.idl>
#import <DOM/EventHandler.idl>

// https://html.spec.whatwg.org/multipage/web-messaging.html#messageport
[Exposed=(Window,Worker,AudioWorklet), Transferable]
interface MessagePort : EventTarget {

    undefined postMessage(any message);
    undefined start();
    undefined close();

    attribute EventHandler onmessage;
    attribute EventHandler onmessageerror;

};