Client - Streaming to Dialogflow

index.js

// 1)
   stopRecording.onclick = function() {
       // recording stopped
       startRecording.disabled = false;
       stopRecording.disabled = true;
 
       // stop audio recorder
       recordAudio.stopRecording(function() {
           // after stopping the audio, get the audio data
           recordAudio.getDataURL(function(audioDataURL) {
 
               //2)
               var files = {
                   audio: {
                       type: recordAudio.getBlob().type || 'audio/wav',
                       dataURL: audioDataURL
                   }
               };
               // submit the audio file to the server
               socketio.emit('message', files);
           });
       });
   };
 
   // 3)
   // when the server found results send
   // it back to the client
   const resultpreview = document.getElementById('results');
   socketio.on('results', function (data) {
       console.log(data);
       // show the results on the screen
       if(data[0].queryResult){
           resultpreview.innerHTML += "" + data[0].queryResult.fulfillmentText;
       }
   });