How to close Server-Sent Events events

Question

I want to know how to close a server-sent events via JavaScript. Below is my dummy code:

var ser=new EventSource("path");
ser.onmessage=function(ev){
if(!ev)
   //want to close HERE!!
else
   console.log(ev);
}

Answer 1

Here is the way that I found worked best for me

var eventSource = new EventSource("path");
eventSource.onerror = eventSourceErrorFunction;
var eventSourceErrorFunction = function(event)
{
        if (event.eventPhase == EventSource.CLOSED) {
            that.eventSource.close();
            console.log("Event Source Closed");
        }  
}