Angular2上的"请添加@NgModule注释"错误

Question

我创建了一个自定义angular2(5.0.x)模块,如下所示:

import { GuageService } from './services/guage.service';
import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { GuageComponent } from './guage/guage.component';

@NgModule({
  declarations: [GuageComponent],

  imports: [
    CommonModule
  ],

  providers : [GuageService],
  exports : [GuageComponent]
})
export class GuageModule {}

我在我的app模块中使用它,如下所示:

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { DxButtonModule, DxCircularGaugeModule } from 'devextreme-angular';
import { GuageModule } from '@kronsbi/bi-module-template';
import { HttpClientModule } from '@angular/common/http';


    import { AppComponent } from './app.component';

        @NgModule({
          declarations: [
            AppComponent
          ],
          imports: [
            BrowserModule,
            DxButtonModule,
            DxCircularGaugeModule,
            HttpClientModule,
            GuageModule
          ],
          bootstrap: [AppComponent]
        })
        export class AppModule { }

当我尝试启动我的应用程序时,我收到以下错误.

模块'AppModule'导入的意外值'GuageModule'.请添加@NgModule注释.

UPDATE

主应用程序的tsconfig:

{
  "compileOnSave": false,
  "compilerOptions": {
    "outDir": "./dist/out-tsc",
    "sourceMap": true,
    "declaration": false,
    "moduleResolution": "node",
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "target": "es5",
    "typeRoots": [
      "node_modules/@types"
    ],
    "lib": [
      "es2017",
      "dom"
    ]
  }
}

guageModule包的ts config:{

 "compilerOptions": {
    "baseUrl": ".",
    "declaration": true,
    "stripInternal": true,
    "experimentalDecorators": true,
    "strictNullChecks": true,
    "noImplicitAny": true,
    "module": "es2015",
    "moduleResolution": "node",
    "paths": {
      "@angular/core": ["node_modules/@angular/core"],
      "rxjs/*": ["node_modules/rxjs/*"]
    },
    "rootDir": ".",
    "outDir": "dist",
    "sourceMap": true,
    "inlineSources": true,
    "target": "es5",
    "skipLibCheck": true,
    "lib": [
      "es2017", 
      "dom"
    ]
  },
  "files": [
    "index.ts"
  ],
  "angularCompilerOptions": {
    "strictMetadataEmit": true
  }
}

Answer 1

如果您使用的是Angular 5.0,则需要添加"annotationsAs": "decorators"到"angularCompilerOptions"您的包中.Angular 5引入了新的优化,默认情况下,在编译时删除了装饰器,因为它们在运行时不需要.这对您已经发现的包不起作用.你可以在Angular 5公告博客中看到这个,"Build Optimizer"段落提到了这一点.Angular 5.0.0版现已推出

我在角度包中使用此设置:

"angularCompilerOptions": {
      "skipTemplateCodegen": true,
      "skipMetadataEmit": false,
      "strictMetadataEmit": true,
      "annotationsAs": "decorators"
   }