title: how can check if server and port is available in nodejs ?
body: <p>I have project with is written with Nodejs. I need to know how to check if an IP with Port is working to connect to.</p>
  
  <p>EX: 
  Check example1.com 443 =>true ;
  Check example1.com 8080 =>false</p>
  
  <p>Thanks</p>