The ws module also allows us to create a WebSocket client outside of the browser environment.
Let's see if we recreate equivalent (and enhanced) functionality to our browser app in the terminal. Essentially, we're going to create a generic interactive WebSocket testing command-line tool!
We'll start by creating a new folder called websocket-client with an index.js file. We'll also need to create a package.json and install the ws module:
$ mkdir websocket-client $ cd websocket-client $ npm init -y $ npm install --save ws
Now let's open index.js in our favorite editor, and begin by requiring and initializing the ws module and the core readline module:
const WebSocket = require('ws') const readline = require('readline') ...
