Add data-loading example to ReactSpa template, and remove server-side rendering (because you really need Redux/Flux or similar for that to make sense)

templates/ReactSpa/ClientApp/components/FetchData.tsx

@@ -0,0 +1,62 @@
+import * as React from 'react';
+
+interface FetchDataExampleState {
+    forecasts: WeatherForecast[];
+    loading: boolean;
+}
+
+export class FetchData extends React.Component<void, FetchDataExampleState> {
+    constructor() {
+        super();        
+        this.state = { forecasts: [], loading: true };
+
+        fetch('/api/SampleData/WeatherForecasts')
+            .then(response => response.json())
+            .then((data: WeatherForecast[]) => {
+                this.setState({ forecasts: data, loading: false });
+            });
+    }
+
+    public render() {
+        let contents = this.state.loading
+            ? <p><em>Loading...</em></p>
+            : FetchData.renderForecastsTable(this.state.forecasts);
+        
+        return <div>
+            <h1>Weather forecast</h1>
+            <p>This component demonstrates fetching data from the server.</p>
+            { contents }
+            <p>For more sophisticated applications, consider an architecture such as Redux or Flux for managing state. You can generate an ASP.NET Core application with React and Redux using <code>dotnet new aspnet/spa/reactredux</code> instead of using this template.</p>
+        </div>;
+    }
+
+    private static renderForecastsTable(forecasts: WeatherForecast[]) {
+        return <table className="table">
+            <thead>
+                <tr>
+                    <th>Date</th>
+                    <th>Temp. (C)</th>
+                    <th>Temp. (F)</th>
+                    <th>Summary</th>
+                </tr>
+            </thead>
+            <tbody>
+            {forecasts.map(forecast =>
+                <tr key={ forecast.dateFormatted }>
+                    <td>{ forecast.dateFormatted }</td>
+                    <td>{ forecast.temperatureC }</td>
+                    <td>{ forecast.temperatureF }</td>
+                    <td>{ forecast.summary }</td>
+                </tr>
+            )}
+            </tbody>
+        </table>;
+    }
+}
+
+interface WeatherForecast {
+    dateFormatted: string;
+    temperatureC: number;
+    temperatureF: number;
+    summary: string;
+}