Angular Material Icon使用详解

 <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="external nofollow" rel="stylesheet">

abstract class DomSanitizer implements Sanitizer {
 abstract sanitize(context: SecurityContext, value: SafeValue | string | null): string | null
 abstract bypassSecurityTrustHtml(value: string): SafeHtml
 abstract bypassSecurityTrustStyle(value: string): SafeStyle
 abstract bypassSecurityTrustScript(value: string): SafeScript
 abstract bypassSecurityTrustUrl(value: string): SafeUrl
 abstract bypassSecurityTrustResourceUrl(value: string): SafeResourceUrl
}

enum SecurityContext {
 NONE: 0
 HTML: 1
 STYLE: 2
 SCRIPT: 3
 URL: 4
 RESOURCE_URL: 5
}

import {MatIconRegistry} from '@angular/material';
import {DomSanitizer} from '@angular/platform-browser';

constructor( iconRegistry:MatIconRegistry ,domSanitizer:DomSanitizer ){
 iconRegistry.addSvgIcon('bell',domSanitizer.bypassSecurityTrustResourceUrl('assets/bell.svg'));
}

import { HttpClientModule} from '@angular/common/http'

@NgModule({
  imports: [
   HttpClientModule,
  ]
})
export class AppModule { }