I have a stream response like following:

I'm using Laravel as backend

public function stream() {
    return response()->stream(function() {
        while (true) {

            if (connection_aborted()) {
                Log::debug('aborted');
                break;
            }
            
            echo "\nevent: process\n", 'data: {"time": ' . time() . '}', "\n\n";
            Log::debug('echoed');

            ob_flush();
            flush();

            sleep(3);
        }
    }, 200, [
        'Cache-Control' => 'no-cache',
        'Content-Type' => 'text/event-stream',
    ]);
}

frontend:

let stream = new EventSource(`http://example.test/api/stream`);
stream.addEventListener('process', event => {
    console.log(event.data)
});

as the code show, it's expected to console.log(event.data) every 3 seconds.

Although I can get the echoed Logs (but not the aborted) in backend, but I can't get any output in the console of browser.

I've googled but nothing helps. How did this error occur and how can it be solved?

Thanks a lot for any replys!