#import #import // https://html.spec.whatwg.org/multipage/server-sent-events.html#eventsource [Exposed=(Window,Worker)] interface EventSource : EventTarget { constructor(USVString url, optional EventSourceInit eventSourceInitDict = {}); readonly attribute USVString url; readonly attribute boolean withCredentials; // ready state const unsigned short CONNECTING = 0; const unsigned short OPEN = 1; const unsigned short CLOSED = 2; readonly attribute unsigned short readyState; // networking attribute EventHandler onopen; attribute EventHandler onmessage; attribute EventHandler onerror; undefined close(); }; dictionary EventSourceInit { boolean withCredentials = false; };