DI explanation

Author: zzb15997937197

APM-Final/src/app/hello/helloWord.component.ts

@@ -7,7 +7,6 @@ import { StudyEnglishComponent} from "../study/study.english.component";
     selector:'hello-word',
     template:'<div class="hello" style="font:200px">hello world</div>',
     styleUrls:['./helloWord.component.css'],
-    providers:[StudyEnglishComponent]
 })
 export class HelloComponent{
 

APM-Final/src/app/study/study.english.component.ts

@@ -2,7 +2,7 @@ import {Component,Injectable} from "@angular/core";
 
 
 @Component({"template":"<div>I love studying</div>"})
-@Injectable()
+@Injectable({providedIn:"root"})
 export class StudyEnglishComponent{