graph.js

...
import Graph from "./Graph";
...
let content = <div>No Data</div>;
if (coinData && coinData.prices && coinData.prices.length > 0)
  content = (
   <div>
    <Totals
      priceArr={coinData.prices}
      freqInDays={freqInDays}
      amountToInvest={amountToInvest}
    />
    <Graph
      priceArr={coinData.prices}
      freqInDays={freqInDays}
      amountToInvest={amountToInvest}
    />
  </div>
  );
if (isLoading) content = <div>Loading</div>;
if (error) content = <div>{error}</div>;
...