无法从 Golang 服务器获取 JS 响应

<button onclick="clicklistener()" id="form-button" type="button" class="btn btn-primary">click</button>

<script>
        const clicklistener = () => {
            console.log('clicklistener()')

            fetch("/address")
                .then(response => {
                    console.log(response)
                })
                .catch(e => {
                    console.log(e)
                })
        }
   </script>

func Handler(writer http.ResponseWriter, request *http.Request) {
    response := jsonResponse{IsAvailable: true, Message: "Available"}

    responseInJsonFormat, err := json.MarshalIndent(response, "", " ")
    if err != nil {
        log.Println("cannot convert response data to JSON")
        return
    }

    writer.Header().Set("Content-Type", "application/json")
    _, err = writer.Write(responseInJsonFormat)
    if err != nil {
        log.Println("cannot convert response data to JSON")
    }
}

fetch('/address')
  .then(response => response.json())
  .then(data => console.log(data))
  .catch(e => console.log(e))