How To Get Default Port Number On Which Web Application Is Running (or Deployed) Using Javascript

I have a web application which is deployed at some port say 8085, and hostname is sample.something.com. Using window.location.host or window.location.port, the port is coming as bl

Solution 1:

If window.location.port is empty that means the application is running on port 80 for http and 443 for https.

As mentioned in a comment, you can use window.location.protocol to check what protocol is used (http or https).

Implementation:

function getPort(){
  if(location.port != ''){
      return location.port;
  }
  elseif(location.protocol== 'http'){
     return80;    
  }
  elseif(location.protocol== 'https'){
     return443;    
  }    
}