Pushing time to browser using channel

I’m trying to push the time to the browser using channels, so I wrote the below:

package main

import (
	"net/http"
	"time"
)

type DataPasser struct {
	logs chan string
}

func main() {
	passer := &DataPasser{logs: make(chan string)}
	go func() {
		for {
			passer.logs <- time.Now().String()
		}
	}()

	http.HandleFunc("/", passer.handleHello)
	http.ListenAndServe(":9999", nil)

}

func (p *DataPasser) handleHello(w http.ResponseWriter, r *http.Request) {
	for {
		w.Write([]byte(<-p.logs))
	}
	/*	for {
			io.WriteString(w, <-p.logs)
		}
	*/
}

It worked by kept adding new lines with each new time, as below:
enter image description here

What I need is to get single line, that is cleared and replaced with the new time every time the server sending time to it? any help?

UPDATE

I tried using SSE server sent event, as below but did not work:

package main

import (
	"net/http"
	"time"
)

type DataPasser struct {
	logs chan string
}

func main() {
	passer := &DataPasser{logs: make(chan string)}
	t := time.NewTicker(time.Second)
	defer t.Stop()

	go func() {
		for range t.C {
			passer.logs <- time.Now().String()
		}
	}()

	http.HandleFunc("/", passer.handleHello)
	http.ListenAndServe(":9999", nil)

}

func (p *DataPasser) handleHello(w http.ResponseWriter, r *http.Request) {
	setupCORS(&w, r)
	w.Header().Set("Content-Type", "text/event-stream")
	w.Header().Set("Cache-Control", "no-cache")
	w.Header().Set("Connection", "keep-alive")
	flusher, ok := w.(http.Flusher)
	if !ok {
		http.Error(w, "Internal error", 500)
		return
	}
	for {
		w.Write([]byte(<-p.logs))
		//	c := []byte(<-p.logs)
		//	fmt.Fprint(w, c)
		flusher.Flush()
	}
	/*	for {
			io.WriteString(w, <-p.logs)
		}
	*/
	//  w.Write([]byte("Hi, from Service: " + ws.name))

}

func setupCORS(w *http.ResponseWriter, req *http.Request) {
	(*w).Header().Set("Cache-Control", "no-cache")
	(*w).Header().Set("Access-Control-Allow-Origin", "*")
	(*w).Header().Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE")
	(*w).Header().Set("Access-Control-Allow-Headers", "Accept, Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token, Authorization")
}

And the html file as:

<html>
<head></head>
<body>
    <div id="counter"  width="500" height="600">
</body>
    <script>
        var source = new EventSource("http://localhost:9999/");
        source.onmessage = function (event) {
            console.log(event)
            var counter = event.data; // JSON.parse(event.data);
            document.getElementById("counter").innerHTML = counter;
        }
    </script>
</html>