Is an EventSource (SSE) supposed to try to reconnect indefinitely?

Question

I\'m working on a project utilizing Server-Sent-Events and have just run into something interesting: connection loss is handled differently between Chrome and Firefox.

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Answer 1

I rewrote the solution of @Wade and after a little bit of testing I came to the conclusion that the functionality stayed the same with less code and better readability (imo). However I am still a beginner and I would love to get feedback from you. I am not sure if I am missing something crucial.

One thing I did not understand was, why you clear the Timeout if the timeout variable gets set back to null every time you try to reconnect. So I just omitted it completely. And I also omitted the check if the wait argument is a function. I just assume it is, so it makes the code cleaner.

var reconnectFrequencySeconds = 1;
var evtSource;

// Putting these functions in extra variables is just for the sake of readability
var waitFunc = function() { return reconnectFrequencySeconds * 1000 };
var tryToSetupFunc = function() {
    setupEventSource();
    reconnectFrequencySeconds *= 2;
    if (reconnectFrequencySeconds >= 64) {
        reconnectFrequencySeconds = 64;
    }
};

var reconnectFunc = function() { setTimeout(tryToSetupFunc, waitFunc()) };

function setupEventSource() {
    evtSource = new EventSource("url"); 
    evtSource.onmessage = function(e) {
      console.log(e);
    };
    evtSource.onopen = function(e) {
      reconnectFrequencySeconds = 1;
    };
    evtSource.onerror = function(e) {
      evtSource.close();
      reconnectFunc();
    };
}

setupEventSource();