Example for template expression

import {Component} from 'angular2/core'
 @Component({

                selector: 'digil',
                providers: [],
                template:`
                <div>
                            	<h2>Hi {{userid}}</h2>
                </div>
            	`,
                directives: []
            	})

            	export class App {
                constructor() {
                             	this.userid = 'newid'
            	}
            	}