Update video-calling-javascript.md

Author: chriswhilar

articles/communication-services/quickstarts/voice-video-calling/includes/video-calling/video-calling-javascript.md

@@ -316,7 +316,10 @@ subscribeToRemoteVideoStream = async (remoteVideoStream) => {
 
     /**
      * isReceiving API is currently an @alpha feature. Do not use in production.
-     */
+     * To use this api please use 'alpha' release of Azure Communication Services Calling Web SDK.
+     * Create a CSS class to style your loading spinner. Take a look at our
+     * video calling quickstart, to see how to create a loading spinner.
+     *
     let loadingSpinner = document.createElement('div');
     loadingSpinner.className = 'loading-spinner';
     remoteVideoStream.on('isReceivingChanged', () => {
@@ -334,6 +337,7 @@ subscribeToRemoteVideoStream = async (remoteVideoStream) => {
             console.error(e);
         }
     });
+    */
 
     const createView = async () => {
         // Create a renderer view for the remote video stream.