v2: prepare to move

v2/lib/core/prerender.js

@@ -0,0 +1,18 @@
+import {matchRoutes} from 'react-router-config';
+
+/**
+ * This helps us to make sure all the async component for that particular route
+ * is loaded before rendering. This is to avoid loading screens on first page load
+ */
+export default function prerender(routeConfig, providedLocation) {
+  const matches = matchRoutes(routeConfig, providedLocation);
+  return Promise.all(
+    matches.map(match => {
+      const {component} = match.route;
+      if (component && component.preload) {
+        return component.preload();
+      }
+      return undefined;
+    })
+  );
+}