TypeError: Web3.providers.WebsocketProvider is not a constructor?

Question

Trying to connect to a geth machine over websocket? JS code.

var Web3=require('web3');
var web3 = new Web3(new 
Web3.providers.WebsocketProvider('ws://10.244.5.43:8546'));
console.log(web3.isConnected());

Not sure how to connect using WebSocket?

Answer 1

I had the same issue with web3 v1.0.0 beta 30. Never got to the bottom of it but skipping the provider construction appeared to fix it:

var Web3=require('web3');
var web3 = new Web3('ws://10.244.5.43:8546');

Answer 2

I assume that you're using a version of Web3.js older than 1.0. I believe that the WebsocketProvider was added in 1.0.