Method _dispatch

test/fixtures/wpt/resources/channel.sub.js:220–228

(type, data)

        };

        _dispatch(type, data) {
            let listeners = this.eventListeners[type];
            if (listeners) {
                // If any listener throws we end up not calling the other
                // listeners. This hopefully makes debugging easier, but
                // is different to DOM event listeners.
                listeners.forEach(fn => fn({type, data}));
            }
        };

    }