npm install asteroid asteroid-immutable-collections-mixin immutable

...

import {createClass} from "asteroid";
import immutableCollectionMixin from "asteroid-immutable-collections-mixin";

const Asteroid = createClass([immutableCollectionMixin]);

// Connect to a Meteor backend
const asteroid = new Asteroid({
  endpoint: "ws://localhost:3008/websocket" // use config
});

// Call a method
let params = [1, 2];
asteroid.call('myMethod', params)
  .then((res) => {
    console.info('response ok');
  })
  .catch((err) => {
    console.warn(err);
  });

// login (manage auto-reconnection)
asteroid.loginWithPassword({"email": login, "password": password})
  .then(res => {
    console.info("loginWithPassword", res);
  })
  .catch(error => {
    console.error("loginWithPassword Error", error);
  });

asteroid.on("loggedIn", () => {
  console.info("loggedIn sent from asteroid");
});

asteroid.on("loggedOut", () => {
  console.info("Loggedout sent from asteroid");
});

asteroid.ddp.on("connected", () => {
  console.info('connected to server');
});

// subscribe
let subscription = asteroid.subscribe("your-publication-key");
let myCollection;
subscriptionon('ready', () => {
  myCollection = asteroid.collections.get("your-collection-store");
});