Can't assign more than one handler to connection events

[melnikaite]

I'd like to catch end event in one place and do reconnect and resubscribe to .allEvents in another place, but I can't assign more than function to connect end and error events of websocket provider. Here is part of code explaining why it happens

WebsocketProvider.prototype.on = function (type, callback) {

    if(typeof callback !== 'function')
        throw new Error('The second parameter callback must be a function.');

    switch(type){
        case 'data':
            this.notificationCallbacks.push(callback);
            break;

        case 'connect':
            this.connection.onopen = callback;
            break;

        case 'end':
            this.connection.onclose = callback;
            break;

        case 'error':
            this.connection.onerror = callback;
            break;
    }

[nivida]

This got implemented in beta.38.

[tsujp]

This does not work beta.55, the method is now close.