init commit

src/app/preloading-strategy.ts

@@ -0,0 +1,12 @@
+import { PreloadingStrategy, Route } from '@angular/router'
+import { Observable, of } from 'rxjs'
+
+/**
+ * 预加载策略
+ */
+export class SelectivePreloadingStrategy implements PreloadingStrategy {
+    preload(route: Route, load: Function): Observable<any> {
+        //默认进行加载，当配置了preload=false时不预加载
+        return route.data && route.data.preload === false ? of(null) : load();
+    }
+}