html - How can call a function in service on click event in angular2? -

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this working plunker : http://plnkr.co/edit/fojhoflsglrb4po5li6b?p=preview . on clicking classes corresponding content @ bottom changes, hardcoded & possible have makes content come service : 

export class subjectservice {   getclass(id : number) : {     if(id==15)       return [{label:  'science', state: false},{label:  'computer science', state: false},{label:  'social science', state: false},{label:  'environmental studies', state: false}];     else if (id==68)        return [{label: 'english', state: false},{label:  'hindi', state: false},{label:  'mathematics', state: false},{label:  'science', state: false}];     else if (id==910)        return [{label: 'english', state: false},{label:  'hindi', state: false}{label:  'social science', state: false},{label:  'sanskrit', state: false}];     else     return [{label: 'english', state: false}{label:  'pol science', state: false},{label:  'comp science', state: false},{label:  'social science', state: false}];   } }

i have small angular 2 app created calling service on click. please see source code here of github. can see heroservice.ts in app/services folder , heroes.component.ts.

repository: https://github.com/khanstudio-github/angular2appaspnet/tree/master/angular2starterapp/angular2starterapp

i hope you. please feel free ask if facing issue.


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