Volume controlled; Volume change only trigger event if volume is different

src/js/bootstrap.js

@@ -20,7 +20,9 @@ let reducers = combineReducers({
 var initialState = {
 	mopidy: {
 		host: window.location.hostname,
-		port: 6680
+		port: 6680,
+		volume: 0,
+		progress: 0
 	},
 	spotify: {
 		country: 'NZ',

src/js/components/VolumeSlider.js

@@ -16,7 +16,10 @@ export default class VolumeSlider extends React.Component{
 	}
 
 	handleChange(e){
-		this.props.onChange( parseInt(e.target.value) )
+		var newVolume = parseInt(e.target.value);
+		if( this.props.volume != newVolume ){
+			this.props.onChange( newVolume )
+		}
 	}
 
 	render(){