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    OpenTok Accelerator TextChat for JavaScript

    Build Status npm license MIT

    The OpenTok Text Chat Accelerator Pack for JavaScript provides functionality you can add to your OpenTok applications that enables users to exchange text messages between mobile or browser-based devices.

    Quick start

    This section shows you how to use the accelerator pack.


    The dependencies for this library are listed in the package.json:

    • jquery.
    • kuende-livestamp.
    • moment.
    • opentok-solutions-logging.
    • underscore.


    Start by installing the dependencies:

    $ npm install --save opentok-text-chat

    Using a module bundler

    If using a bundler like browserify or webpack:

    const textChat = require('opentok-text-chat');

    Without a module bundler

    If you are not using a module bundler, include the accelerator pack in your html as well as the installed dependencies:

    <script src="node_modules/opentok-text-chat/dist/opentok-text-chat.js"></script>
    <script src="node_modules/opentok-solutions-logging/dist/opentok-solutions-logging.js"></script>
    <script src=""></script>
    <script src="your/path/to/underscore-min.js"></script>
    <script src="your/path/to/jquery.min.js"></script>
    <script src="your/path/to/moment.min.js"></script>
    <script src="your/path/to/livestamp.min.js"></script>

    Also, as our Sample Application demonstrates, you can specify some of the requirements to be sourced from cloudfare:

      <script src=""></script>
        <script src=""></script>
        <script src=""></script>
        <script src=""></script>


    The text chat module will be available in global scope as TextChatAccPack

    NOTE: Click here for a list of all OpenTok accelerator packs.

    Exploring the code

    The TextChatAccPack class in opentok-text-chat.js is the backbone of the text chat communication features for the app.

    This class sets up the text chat UI views and events, and provides functions for sending, receiving, and rendering individual chat messages.


    The following options fields are used in the TextChatAccPack constructor:

    Feature Field
    Set the session. session
    Set the id and name for the user. sender
    Set the chat container. textChatContainer
    Sets the position of the element that displays the information for the character count within the UI. controlsContainer
    Set the maximum message length. limitCharacterMessage
    Set the sender alias and the sender ID of the outgoing messages. sender
    Set the text chat container to automatically be displayed. alwaysOpen
    Custom message to display while waiting for other users to join. waitingMessage

    If you're using a bundler like webpack or Browserify, you can install the the text chat component with npm, and import into your application:

    const TextChatAccPack = require('opentok-text-chat');
    const textChat = new TextChatAccPack(options);

    Otherwise, the package will need to be in global scope to be initialized:

    const textChatOptions = {
     session: session,
     sender: {
       id: 'myCustomIdentifier',
       alias: 'David',
     limitCharacterMessage: 160,
     controlsContainer: '#feedControls',
     textChatContainer: '#chatContainer',
     alwaysOpen: true
    const textChat = new TextChatAccPack(textChatOptions);

    TextChatAccPack Methods

    The TextChat component defines the following methods:

    Method Description
    showTextChat() Show the text chat view.
    hideTextChat() Hide the text chat view.
    isDisplayed() Determines if the text chat accelerator pack is displayed.
    isEnabled() Determines if the text chat accelerator pack is enabled.
    deliverUnsentMessages() Deliver all prior messages to new participants.

    For example, this line determines whether the text chat accelerator pack is displayed:

    const displayed = textChat.isDisplayed();


    The TextChat component emits the following events:

    Method Description
    messageReceived A new message has been received.
    messageSent A new message has been sent.
    errorSendingMessage An error occurred when sending a message.

    The following code shows how to subscribe to these events using opentok-accelerator-core:

    otCore.on('messageReceived', event =>  . . .)
    otCore.on('messageSent', event =>  . . .)
    otCore.on('errorSendingMessage', error =>  . . .)

    Sample Application


    If you'd like to contribute to OpenTok Accelerator Pack development, please follow the guidelines in the contributing files.


    This project is under the MIT License

    About OpenTok


    The OpenTok platform, developed by TokBox, makes it easy to embed high-quality interactive video, voice, messaging, and screen sharing into web and mobile apps. For more info on how OpenTok works, check out our Core Concepts.


    npm i @bouncedinc/opentok-text-chat

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