iron-socket-io-client | Vaadin

Polymer element to connect to socket.IO WebSocket

[ This description is mirrored from at on 2019-05-10 ]

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Polymer element to connect to socket-IO

This element uses Polymer 2 native classes (ES6 syntax).


bower install --save Collaborne/iron-socket-io-client


The component provides an imperative interface to connect to a Socket.IO server. The messages emitted by the server must use the event message, and must be objects with minimally a type property. Handlers can be defined based on (a prefix of) the type property of the messages.

  1. Embed the component
  2. Call invoke(uri, [token]) to connect to the / location at the given URI. The optional token argument will be used as 'Bearer' token in the authorization header of the initial request.
  3. Call registerHandler(typePrefix, handler) to receive messages with their type property starting the with the prefix typePrefix. The handler is invoked with the complete message as argument, and any return value of the handler is ignored. All handlers matching a message are involved in the order of registration.
  4. Call send(message) to send message events to the server, or emit(type, message) to emit events with the given type.
  5. Monitor event iron-socket-io-client-error for potential errors on the WebSocket connection


This software is licensed under the Apache 2 license, quoted below.

Copyright 2011-2017 Collaborne B.V. <>

Licensed under the Apache License, Version 2.0 (the "License"); you may not
use this file except in compliance with the License. You may obtain a copy of
the License at

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
License for the specific language governing permissions and limitations under
the License.


Link to this version
ImportedReleased 04 October 2018Apache License 2.0
Framework Support
Polymer 2.0+
Browser Independent
Install with
bower install --save Collaborne/iron-socket-io-client"#2.5.2"
Run the above Bower command in your project folder. If you have any issues installing, please contact the author.
Release notes - Version 2.5.2


  • polymer#Polymer/polymer#^2.0.0