Javascript Websocket subscribe to channel

Question

I am trying to subscribe to channel using native WebSocket in vanilla javascript. I have the following code: 

let ws = new WebSocket('wss://ws-feed.gdax.com');

var params = {
   "type": "subscribe",
   "channels": [{"name": "ticker", "product_ids": ["BTC-USD"]}]
}

ws.onmessage = function(msg) {
    console.log(msg);
}

I am trying to connect to this channel but I am not able to do so

Answer 1

This is how you can do it

let ws = new WebSocket('ws://localhost:4000/cable');

ws.onopen = function(){
  //Subscribe to the channel
  ws.send(JSON.stringify({"command": "subscribe","identifier":"{\"channel\":\"ArticlesChannel\"}"}))
}    

ws.onmessage = function(msg) {
    console.log(JSON.parse(msg.data).message);
}