Snapshot

() => {
   const [events, setEvents] = React.useState([])
 
   const feed = React.useMemo(() => new Feed(), [])
   React.useEffect(() => {
     feed.connect('wss://demo.dxfeed.com/webservice/cometd')
     return () => feed.disconnect()
   }, [])
   
   const subscriptionRef = React.useRef()
   const subscribe = () => {
     // Clear
     subscriptionRef.current && subscriptionRef.current.unsubscribe()
     setEvents([])
     // Subscribe
     subscriptionRef.current = feed.subscribeTimeSeriesSnapshot(
       'AAPL{=d}',
       'Candle',
       1690374317924,
       (snapshot) => {
        setEvents(snapshot)
       }
     )
   }
 
   return (
     <>
       <Button variant="outlined" onClick={subscribe}>
         Subscribe
       </Button>
       <DataViewer events={events} />
     </>
   )
 }