由模块'AppModule'导入的意外指令'MatSpinner'。 请添加@NgModule注释

Question

Angular 5 -

here are the npm modules (package.json)-

   "@angular/animations": "^5.0.0",
    "@angular/cdk": "^5.0.0-rc.2",
    "@angular/common": "^5.0.0",
    "@angular/compiler": "^5.0.0",
    "@angular/core": "^5.0.0",
    "@angular/forms": "^5.0.0",
    "@angular/http": "^5.0.0",
    "@angular/material": "^5.0.0-rc.2",
    "@angular/platform-browser": "^5.0.0",
    "@angular/platform-browser-dynamic": "^5.0.0",
    "@angular/router": "^5.0.0",
    "core-js": "^2.4.1",
    "hammerjs": "^2.0.8",
    "rxjs": "^5.5.2",
    "zone.js": "^0.8.14"

I am using Angular material Spinner as MatSpinner Directive from Material module

import { MatSpinner } from "@angular/material";
@NgModule({
imports: [

MatSpinner
],
declarations: [],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }

Here is the HTML:

<mat-spinner></mat-spinner>

I am Getting an ERROR-

Unexpected directive 'MatSpinner' imported by the module 'AppModule'. Please add a @NgModule annotation.

Answer 1

In your app-module, you would generally import MatProgressSpinnerModule, not MatSpinner. MatSpinner would be imported in your component.

Answer 2

MatSpinner & MatProgressSpinner are component and already part of MatProgressSpinnerModule .

In Angular,

• A component can not be added in imports of @NgModule
• A component can not be part of declarations of more than one @NgModule

As both the components are available in MatProgressSpinnerModule , you should add MatProgressSpinnerModule in imports of your @NgModule .

Example

import { MatProgressSpinnerModule } from '@angular/material/progress-spinner';

@NgModule({
  imports: [
    MatProgressSpinnerModule
  ],
  declarations: [],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }