以下代码可以根据不同的Angular-cli环境变量有条件地加载模拟服务。然而,它会产生一个副作用,即模拟服务被构建到最终转码和缩小的输出文件中。
在Angular2中有更好的方法来实现惰性加载模块吗?
app.module.ts:
import {BrowserModule} from "@angular/platform-browser";
import {NgModule} from "@angular/core";
import {FormsModule} from "@angular/forms";
import {HttpModule} from "@angular/http";
import {AppComponent} from "./app.component";
import {environment} from "../environments/environment";
import {XService} from "./xxx.service";
import {XMockService} from "./xxx-mock.service";
let importedModules: Array<any> = [
XService
];
if (environment.mock) {
importedModules.push(
{provide: XService, useClass: XMockService}
);
} else {
importedModules.push(
XService
);
}
@NgModule({
declarations: [
AppComponent
],
imports: [
BrowserModule,
FormsModule,
HttpModule
],
providers: importedModules,
bootstrap: [AppComponent]
})
export class AppModule {}