showStat function   is not working react js 
 
   loadStats = () => {
  
    if (publishStream) {
        publishStream.getStats(function (stats) {
            if (stats && stats.outboundStream) {
                if (stats.outboundStream.video) {
                  showStat(stats.outboundStream.video, "outVideoStat");
                    let vBitrate = (stats.outboundStream.video.bytesSent - videoBytesSent) * 8;
                    if (('#outVideoStatBitrate').length == 0) {
                        let html = "<div>Bitrate: " + "<span id='outVideoStatBitrate' style='font-weight: normal'>" + vBitrate + "</span>" + "</div>";
                        ("#outVideoStat").append(html);
                    } else {
                        ('#outVideoStatBitrate').text(vBitrate);
                    }
                    videoBytesSent = stats.outboundStream.video.bytesSent;
                    if(new Date().valueOf() - CONNECTION_QUALITY_UPDATE_TIMEOUT_MS > publishConnectionQualityStat.connectionQualityUpdateTimestamp) {
                        publishConnectionQualityStat.quality = CONNECTION_QUALITY.UNKNOWN;
                    }
                }
                if (stats.outboundStream.audio) {
                 showStat(stats.outboundStream.audio, "outAudioStat");
                    let aBitrate = (stats.outboundStream.audio.bytesSent - audioBytesSent) * 8;
                    if (('#outAudioStatBitrate').length == 0) {
                        let html = "<div>Bitrate: " + "<span id='outAudioStatBitrate' style='font-weight: normal'>" + aBitrate + "</span>" + "</div>";
                        ("#outAudioStat").append(html);
                    } else {
                        ('#outAudioStatBitrate').text(aBitrate);
                    }
                    audioBytesSent = stats.outboundStream.audio.bytesSent;
                }
            }
            if (publishConnectionQualityStat.quality !== undefined) {
              showStat({"quality": publishConnectionQualityStat.quality}, "outConnectionStat");
            }
        });
    }
    if (previewStream) {
        previewStream.getStats(function (stats) {
            if (stats && stats.inboundStream) {
                if (stats.inboundStream.video) {
                  showStat(stats.inboundStream.video, "inVideoStat");
                    let vBitrate = (stats.inboundStream.video.bytesReceived - videoBytesReceived) * 8;
                    if (('#inVideoStatBitrate').length == 0) {
                        let html = "<div>Bitrate: " + "<span id='inVideoStatBitrate' style='font-weight: normal'>" + vBitrate + "</span>" + "</div>";
                        ("#inVideoStat").append(html);
                    } else {
                        ('#inVideoStatBitrate').text(vBitrate);
                    }
                    videoBytesReceived = stats.inboundStream.video.bytesReceived;
                    if(new Date().valueOf() - CONNECTION_QUALITY_UPDATE_TIMEOUT_MS > playConnectionQualityStat.connectionQualityUpdateTimestamp) {
                        playConnectionQualityStat.quality = CONNECTION_QUALITY.UNKNOWN;
                    }
                }
                if (stats.inboundStream.audio) {
                  showStat(stats.inboundStream.audio, "inAudioStat");
                    let aBitrate = (stats.inboundStream.audio.bytesReceived - audioBytesReceived) * 8;
                    if (('#inAudioStatBitrate').length == 0) {
                        let html = "<div style='font-weight: bold'>Bitrate: " + "<span id='inAudioStatBitrate' style='font-weight: normal'>" + aBitrate + "</span>" + "</div>";
                        ("#inAudioStat").append(html);
                    } else {
                        ('#inAudioStatBitrate').text(aBitrate);
                    }
                    audioBytesReceived = stats.inboundStream.audio.bytesReceived;
                }
                if (playConnectionQualityStat.quality !== undefined) {
                    showStat({"quality": playConnectionQualityStat.quality}, "inConnectionStat");
                }
            }
        });
    }
  function showStat(stat, type) {
      Object.keys(stat).forEach((key) => {
        if (typeof stat[key] !== "object") {
          let k = key.split(/(?=[A-Z])/);
          let metric = "";
          for (let i = 0; i < k.length; i++) {
            metric += k
[0].toUpperCase() + k.substring(1) + " ";
          }
          if (("#" + key + "-" + type).length == 0) {
            let html =
              "<div style='font-weight: bold'>" +
              metric.trim() +
              ": <span id='" +
              key +
              "-" +
              type +
              "' style='font-weight: normal'></span>" +
              "</div>";
            // $(html).insertAfter("#" + type);
            ("#" + type).append(html);
          } else {
            ("#" + key + "-" + type).text(stat[key]);
          }
        }
      });
    
      console.log("showStat function called");
    }
    console.log("loadStats function called");
}