Javascript doesn't catch error in WebSocket instantiation

Question

My socket currently throws net::ERR_CONNECTION_REFUSED because the server isn\'t running, which I want it to do at the moment.

The problem is that the following piec

Answer 1

I tried creating fiddle with it and I am able to see line printed.

host='localhost';
port=100;
try {

    ws = new WebSocket('ws://'+ host + ':' + port + '/');
  }
  catch (err) {
    console.log('This never prints');
  }
  ws.onerror = function (error) {
    console.log(error);
  };

https://jsfiddle.net/xzumgag0/