text: 
  
  class IGVClient {
  
      constructor(host, port) {
          this.host = host || localhost;
          this.port = port || 60151;
      }
  
      async send(command, paramString) {
  
          var salt = Math.random(); // to prevent the browser from caching the response and preventing a relaunch if igv was shut down
          var localURL = `http://127.0.0.1:${this.port}/${command}?${decodeURIComponent(paramString)}&callback=igv.callBack();&salt=${salt}`;
  
      }
  
  }