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This module adds Node.js integration to Drupal. It provides an API that other modules can use to add realtime capabilities to Drupal, such as push notifications or chat. The module relies on a Node.js server application that maintains an open connection with the visitor's browser to enable instant communication. In order to use this module, you will need to install the Node.js application on a server.
For an overview of what Node.js is and why you would use it with Drupal, watch this What is Node.js video from Drupalize.Me. Note that the installation procedure has changed, and the video may be outdated.
1. Install Node.js on your server, if not installed yet. Download the installer and follow the instructions on the Node.js website: https://nodejs.org/en/download/
2. Install the drupal-node.js server application and ensure that the application is running. Follow the instruction on GitHub:
3. Install and enable the Node.js integration Drupal module on your site.
4. Visit the Node.js configuration page under the Configuration menu, and enter the connection information for your Node.js server application. The protocol, port, and service key settings should match the settings you entered in the config file of the Node.js server application. The host should be set to the hostname of the server on which you installed the Node.js server application. This host needs to be publicly accessible (i.e. "localhost" will not work).
5. Visit the status page of your Drupal site and ensure that there are no errors. Node.js should report that it has successfully connected to the Node.js server.
Note: The Drupal module and Node.js server application are sensitive to version numbers. The Drupal status page will show an error if the versions are not compatible.
Should you need any assistance with the installation, please feel free to open a support request in the module's issue queue.