PusherCoins shows the current and past price information about BTC, LTC, and ETH using data from pCryptocurrency. The current Bitcoin, Ether, and Litecoin price will be updated every 10 seconds and the change will be realtime and seen across other connected clients connected via Pusher. https://medium.com/front-end-weekly/build-a-realtime-pwa-with-react-99e7b0fd3270