Add easy async component.

src/Async.tsx

@@ -118,3 +118,27 @@ export function Await<T>({ async, children, fallback }: {
 	// Promise is fulfilled, rendering the children with result data.
 	return children(async.data);
 }
+
+/**
+ * Easy async component with fallback and fulfilled children render.
+ * @param promise The promise.
+ * @param children Renderer function of the children, takes promised data as argument.
+ * @param fallback Content shown when the promise is not fulfilled yet.
+ * @constructor
+ */
+export function Async<T>({promise, fallback, children}: {
+	promise: Promisable<T>|PromiseFn<T>;
+	children: (async: T) => React.ReactElement;
+	fallback?: React.ReactElement;
+})
+{
+	// Get async data from given promise.
+	const async = useAsync(promise, [promise]);
+
+	return (
+		// Wait for promised data.
+		<Await async={async} fallback={fallback ?? undefined}>
+			{children}
+		</Await>
+	)
+}