Angular2：从给定文件夹动态加载模块

Question

app
 |-plugins
       |-plugin1
           |-config.json
           |-plugin1.module.ts
           |-plugin1.component.ts

       |-plugin2
           |-config.json
           |-plugin2.module.ts
           |-plugin2.component.ts

As you can see above, I have "app/plugins" folder, which contains plugins. Each plugin will contain one "config.json" file which will tell some configuration including -

{
   path: "feature1",
   moduleFile: "feature1.module",
   moduleClassName: "Feature1Module"
}

So what I want is, before application bootstrap it will scan the "app/plugins" folder and load all plugin configurations, and lazily register all module routes. For above example the route will be

{
     path: "feature1",
     loadChildren: "app/plugins/plugin1/plugin1.module#Plugin1Module"
}

That way, we can drop new plugin into plugin folder and refresh the application, and our newly dropped plugin is up and running.

Anyone knows how can I achieve this?

NOTE: I am on angular2 latest(2.1.0)

Answer 1

I'm looking for the same behavior than the one you're describing and I think I've found how to do it, thanks to this github issue : Lazy loading components without Route

Here is the code I've written to do it : plunker here

• First : dynamic.module.ts, the dynamically loaded module and its component

   import { Component, NgModule } from '@angular/core' @Component({ selector: 'my-test', template: `<h1>html template of TestComponent from DynamicModule</h1>` }) export class TestComponent { } @NgModule({ declarations: [TestComponent], exports: [TestComponent] }) export class DynamicModule { } 

• Second : here is the component which dynamically loads module when you give it the module path.

   import { Component, ViewContainerRef, Compiler, ComponentFactory, ComponentFactoryResolver, ModuleWithComponentFactories, ComponentRef, ReflectiveInjector, SystemJsNgModuleLoader } from '@angular/core'; class ModuleNode { modulePath: string; componentName: string; } @Component({ moduleId: module.id, selector: 'widgetContainer', templateUrl: './widgetContainer.component.html' }) export class WidgetContainerComponent { widgetConfig: string; module: ModuleNode; cmpRef: ComponentRef<any>; constructor(private widgetService: WidgetLoader, private viewref: ViewContainerRef, private resolver: ComponentFactoryResolver, private loader: SystemJsNgModuleLoader, private compiler: Compiler){} openWebApp(menu:any) { this.loader.load(menu.modulePath) // load the module and its components .then((modFac) => { // the missing step, need to use Compiler to resolve the module's embedded components this.compiler.compileModuleAndAllComponentsAsync<any>(modFac.moduleType) .then((factory: ModuleWithComponentFactories<any>) => { return factory.componentFactories.find(x => x.componentType.name === menu.componentName); }) .then(cmpFactory => { // need to instantiate the Module so we can use it as the provider for the new component let modRef = modFac.create(this.viewref.parentInjector); this.cmpRef = this.viewref.createComponent(cmpFactory, 0, modRef.injector); // done, now Module and main Component are known to NG2 }); }); } ngOnDestroy() { if (this.cmpRef) { this.cmpRef.destroy(); } } 

  }

What do you think about that? Does it help? Thanks a lot for your feedback.